/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/array-crafted/zero_sum_const3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:00:59,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:00:59,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:00:59,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:00:59,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:00:59,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:00:59,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:00:59,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:00:59,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:00:59,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:00:59,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:00:59,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:00:59,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:00:59,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:00:59,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:00:59,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:00:59,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:00:59,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:00:59,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:00:59,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:00:59,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:00:59,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:00:59,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:00:59,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:00:59,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:00:59,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:00:59,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:00:59,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:00:59,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:00:59,778 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:00:59,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:00:59,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:00:59,780 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:00:59,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:00:59,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:00:59,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:00:59,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:00:59,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:00:59,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:00:59,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:00:59,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:00:59,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:00:59,782 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:00:59,782 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:00:59,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:00:59,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:00:59,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:00:59,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:00:59,979 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:00:59,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2022-01-31 10:01:00,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da658349/e112968b6f27410abeb71ec944be2fd8/FLAGb9214b9b4 [2022-01-31 10:01:00,351 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:01:00,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2022-01-31 10:01:00,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da658349/e112968b6f27410abeb71ec944be2fd8/FLAGb9214b9b4 [2022-01-31 10:01:00,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da658349/e112968b6f27410abeb71ec944be2fd8 [2022-01-31 10:01:00,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:01:00,784 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:01:00,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:01:00,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:01:00,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:01:00,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ea8c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00, skipping insertion in model container [2022-01-31 10:01:00,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:01:00,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:01:00,920 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c[406,419] [2022-01-31 10:01:00,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:01:00,938 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:01:00,945 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c[406,419] [2022-01-31 10:01:00,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:01:00,958 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:01:00,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00 WrapperNode [2022-01-31 10:01:00,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:01:00,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:01:00,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:01:00,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:01:00,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:01:00,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:01:00,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:01:00,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:01:00,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (1/1) ... [2022-01-31 10:01:00,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:01:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:01,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 10:01:01,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 10:01:01,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:01:01,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:01:01,042 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:01:01,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:01:01,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:01:01,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 10:01:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:01:01,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 10:01:01,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:01:01,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:01:01,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:01:01,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:01:01,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:01:01,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:01:01,104 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:01:01,106 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:01:01,284 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:01:01,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:01:01,288 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-01-31 10:01:01,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:01:01 BoogieIcfgContainer [2022-01-31 10:01:01,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:01:01,290 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:01:01,290 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:01:01,291 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:01:01,317 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:01:01" (1/1) ... [2022-01-31 10:01:01,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:01:01 BasicIcfg [2022-01-31 10:01:01,344 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:01:01,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:01:01,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:01:01,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:01:01,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:01:00" (1/4) ... [2022-01-31 10:01:01,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3280dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:01:01, skipping insertion in model container [2022-01-31 10:01:01,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:01:00" (2/4) ... [2022-01-31 10:01:01,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3280dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:01:01, skipping insertion in model container [2022-01-31 10:01:01,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:01:01" (3/4) ... [2022-01-31 10:01:01,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3280dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:01:01, skipping insertion in model container [2022-01-31 10:01:01,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:01:01" (4/4) ... [2022-01-31 10:01:01,361 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.cJordan [2022-01-31 10:01:01,365 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:01:01,365 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:01:01,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:01:01,418 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 10:01:01,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:01:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:01:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 10:01:01,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:01,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:01,442 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1712930584, now seen corresponding path program 1 times [2022-01-31 10:01:01,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:01,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591071333] [2022-01-31 10:01:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:01,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:01,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:01,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:01,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591071333] [2022-01-31 10:01:01,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591071333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:01:01,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:01:01,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:01:01,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035822190] [2022-01-31 10:01:01,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:01:01,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:01:01,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:01,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:01:01,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:01:01,635 INFO L87 Difference]: Start difference. First operand has 39 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:01,707 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-01-31 10:01:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:01:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 10:01:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:01,719 INFO L225 Difference]: With dead ends: 39 [2022-01-31 10:01:01,720 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 10:01:01,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:01:01,728 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:01,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 50 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:01:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 10:01:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 10:01:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-31 10:01:01,755 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2022-01-31 10:01:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:01,756 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-31 10:01:01,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-31 10:01:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 10:01:01,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:01,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:01,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:01:01,758 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1568047698, now seen corresponding path program 1 times [2022-01-31 10:01:01,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:01,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744847125] [2022-01-31 10:01:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:01,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:01,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:01,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744847125] [2022-01-31 10:01:01,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744847125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:01:01,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:01:01,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:01:01,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893583975] [2022-01-31 10:01:01,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:01:01,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:01:01,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:01:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:01:01,870 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:01,936 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-01-31 10:01:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 10:01:01,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 10:01:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:01,939 INFO L225 Difference]: With dead ends: 34 [2022-01-31 10:01:01,939 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 10:01:01,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:01:01,943 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:01,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:01:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 10:01:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-31 10:01:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-31 10:01:01,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2022-01-31 10:01:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:01,954 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-31 10:01:01,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-31 10:01:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 10:01:01,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:01,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:01,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:01:01,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:01,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1799120725, now seen corresponding path program 1 times [2022-01-31 10:01:01,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:01,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50705721] [2022-01-31 10:01:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:01,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:02,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:01:02,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:02,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50705721] [2022-01-31 10:01:02,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50705721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:01:02,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:01:02,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:01:02,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961725173] [2022-01-31 10:01:02,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:01:02,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:01:02,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:01:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:01:02,024 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:02,090 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-01-31 10:01:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:01:02,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 10:01:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:02,091 INFO L225 Difference]: With dead ends: 46 [2022-01-31 10:01:02,091 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 10:01:02,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:01:02,095 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:02,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 27 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:01:02,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 10:01:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-01-31 10:01:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-01-31 10:01:02,098 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2022-01-31 10:01:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:02,098 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-01-31 10:01:02,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:02,098 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-01-31 10:01:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 10:01:02,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:02,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:02,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 10:01:02,099 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1170444097, now seen corresponding path program 1 times [2022-01-31 10:01:02,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:02,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236381994] [2022-01-31 10:01:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:02,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:02,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:01:02,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236381994] [2022-01-31 10:01:02,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236381994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681515705] [2022-01-31 10:01:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:02,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:02,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:02,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 10:01:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:01:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:01:02,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:01:02,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681515705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:02,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:02,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 10:01:02,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147557961] [2022-01-31 10:01:02,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:02,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 10:01:02,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 10:01:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 10:01:02,437 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:02,526 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-01-31 10:01:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:01:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 10:01:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:02,530 INFO L225 Difference]: With dead ends: 42 [2022-01-31 10:01:02,531 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 10:01:02,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 10:01:02,537 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:02,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:01:02,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 10:01:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 10:01:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-01-31 10:01:02,550 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2022-01-31 10:01:02,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:02,551 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-01-31 10:01:02,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-01-31 10:01:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 10:01:02,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:02,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:02,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:02,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:02,768 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1436093692, now seen corresponding path program 2 times [2022-01-31 10:01:02,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:02,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630333399] [2022-01-31 10:01:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:02,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:02,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:01:02,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630333399] [2022-01-31 10:01:02,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630333399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123694467] [2022-01-31 10:01:02,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:01:02,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:02,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:02,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:02,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 10:01:02,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:01:02,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:02,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:01:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:01:03,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:01:03,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123694467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:03,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:03,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-31 10:01:03,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646076704] [2022-01-31 10:01:03,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:03,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:01:03,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:01:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:01:03,085 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:03,181 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-01-31 10:01:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:01:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 10:01:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:03,182 INFO L225 Difference]: With dead ends: 60 [2022-01-31 10:01:03,182 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 10:01:03,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:01:03,183 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:03,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 27 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:01:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 10:01:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2022-01-31 10:01:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-01-31 10:01:03,192 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2022-01-31 10:01:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:03,192 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-01-31 10:01:03,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-01-31 10:01:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 10:01:03,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:03,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:03,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:03,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:03,408 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:03,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1536293776, now seen corresponding path program 3 times [2022-01-31 10:01:03,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:03,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426506981] [2022-01-31 10:01:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:03,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:04,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:04,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:04,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426506981] [2022-01-31 10:01:04,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426506981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:04,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244744484] [2022-01-31 10:01:04,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:01:04,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:04,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:04,342 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:04,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 10:01:04,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 10:01:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-31 10:01:04,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:05,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:01:05,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 29 [2022-01-31 10:01:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:05,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:09,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:01:09,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2022-01-31 10:01:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:11,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244744484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:11,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:11,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 30] total 69 [2022-01-31 10:01:11,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204186604] [2022-01-31 10:01:11,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:11,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 10:01:11,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 10:01:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=4246, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 10:01:11,722 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 69 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:14,730 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2022-01-31 10:01:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 10:01:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 10:01:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:14,735 INFO L225 Difference]: With dead ends: 166 [2022-01-31 10:01:14,735 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 10:01:14,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 57 SyntacticMatches, 31 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 4500 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1173, Invalid=11937, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 10:01:14,738 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:14,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 216 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 616 Invalid, 0 Unknown, 500 Unchecked, 0.3s Time] [2022-01-31 10:01:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 10:01:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2022-01-31 10:01:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.155844155844156) internal successors, (89), 77 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-01-31 10:01:14,746 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2022-01-31 10:01:14,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:14,747 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-01-31 10:01:14,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-01-31 10:01:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 10:01:14,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:14,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:14,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:14,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:14,948 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1266511666, now seen corresponding path program 4 times [2022-01-31 10:01:14,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:14,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187086705] [2022-01-31 10:01:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:14,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:15,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 10:01:15,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187086705] [2022-01-31 10:01:15,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187086705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056120170] [2022-01-31 10:01:15,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:01:15,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:15,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:15,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 10:01:15,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:01:15,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:01:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 10:01:15,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 10:01:15,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056120170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:15,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:15,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 10:01:15,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118706982] [2022-01-31 10:01:15,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:15,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:01:15,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:01:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:01:15,304 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:15,513 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2022-01-31 10:01:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:01:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 10:01:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:15,514 INFO L225 Difference]: With dead ends: 144 [2022-01-31 10:01:15,514 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 10:01:15,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:01:15,515 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:15,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 48 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:01:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 10:01:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2022-01-31 10:01:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.130952380952381) internal successors, (95), 84 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-01-31 10:01:15,519 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 54 [2022-01-31 10:01:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:15,519 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-01-31 10:01:15,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-01-31 10:01:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 10:01:15,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:15,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:15,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 10:01:15,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:15,727 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash -46090869, now seen corresponding path program 5 times [2022-01-31 10:01:15,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:15,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150786801] [2022-01-31 10:01:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:15,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:01:15,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:15,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150786801] [2022-01-31 10:01:15,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150786801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:15,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000001135] [2022-01-31 10:01:15,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:01:15,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:15,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:15,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 10:01:15,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 10:01:15,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:01:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:01:15,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:01:16,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000001135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:16,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:16,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 10:01:16,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256356303] [2022-01-31 10:01:16,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:16,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:01:16,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:01:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:01:16,103 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:16,311 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2022-01-31 10:01:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:01:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 10:01:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:16,312 INFO L225 Difference]: With dead ends: 73 [2022-01-31 10:01:16,312 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 10:01:16,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 10:01:16,313 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:16,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 43 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:01:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 10:01:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-01-31 10:01:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2022-01-31 10:01:16,316 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2022-01-31 10:01:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:16,316 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2022-01-31 10:01:16,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2022-01-31 10:01:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 10:01:16,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:16,316 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:16,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:16,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:16,528 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1324043809, now seen corresponding path program 6 times [2022-01-31 10:01:16,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:16,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142572428] [2022-01-31 10:01:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:16,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:19,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:19,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:19,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142572428] [2022-01-31 10:01:19,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142572428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:19,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840055062] [2022-01-31 10:01:19,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:01:19,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:19,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:19,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:19,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 10:01:19,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 10:01:19,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:19,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 100 conjunts are in the unsatisfiable core [2022-01-31 10:01:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:19,433 INFO L387 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 [2022-01-31 10:01:19,535 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-01-31 10:01:19,536 INFO L387 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 23 treesize of output 22 [2022-01-31 10:01:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:19,648 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-01-31 10:01:19,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 37 [2022-01-31 10:01:22,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:22,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:22,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:01:22,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:22,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:01:23,033 INFO L353 Elim1Store]: treesize reduction 40, result has 61.2 percent of original size [2022-01-31 10:01:23,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 60 treesize of output 82 [2022-01-31 10:01:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:23,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:55,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 116 [2022-01-31 10:01:55,438 INFO L353 Elim1Store]: treesize reduction 79, result has 10.2 percent of original size [2022-01-31 10:01:55,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1224 treesize of output 897 [2022-01-31 10:01:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:56,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840055062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:56,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:56,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 39, 46] total 127 [2022-01-31 10:01:56,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650933822] [2022-01-31 10:01:56,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:56,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 10:01:56,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 10:01:56,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=14916, Unknown=8, NotChecked=0, Total=16002 [2022-01-31 10:01:56,590 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 127 states, 127 states have (on average 1.3858267716535433) internal successors, (176), 124 states have internal predecessors, (176), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:21,528 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2022-01-31 10:02:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 10:02:21,528 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.3858267716535433) internal successors, (176), 124 states have internal predecessors, (176), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 10:02:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:21,529 INFO L225 Difference]: With dead ends: 177 [2022-01-31 10:02:21,529 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 10:02:21,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 48 SyntacticMatches, 33 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8770 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=1476, Invalid=21467, Unknown=9, NotChecked=0, Total=22952 [2022-01-31 10:02:21,533 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:21,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 264 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 349 Invalid, 0 Unknown, 784 Unchecked, 0.2s Time] [2022-01-31 10:02:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 10:02:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 144. [2022-01-31 10:02:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.143884892086331) internal successors, (159), 139 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2022-01-31 10:02:21,538 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 66 [2022-01-31 10:02:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:21,538 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2022-01-31 10:02:21,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.3858267716535433) internal successors, (176), 124 states have internal predecessors, (176), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2022-01-31 10:02:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 10:02:21,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:21,540 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:21,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:21,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:21,745 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash -298919137, now seen corresponding path program 7 times [2022-01-31 10:02:21,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:21,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360901866] [2022-01-31 10:02:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:21,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:21,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 10:02:21,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:21,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360901866] [2022-01-31 10:02:21,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360901866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:21,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282700237] [2022-01-31 10:02:21,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:02:21,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:21,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:21,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:02:21,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 10:02:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:21,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:02:21,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 10:02:22,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 10:02:22,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282700237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:22,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:22,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 10:02:22,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221689673] [2022-01-31 10:02:22,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:22,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:02:22,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:22,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:02:22,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:02:22,140 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:22,430 INFO L93 Difference]: Finished difference Result 215 states and 230 transitions. [2022-01-31 10:02:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:02:22,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 10:02:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:22,431 INFO L225 Difference]: With dead ends: 215 [2022-01-31 10:02:22,432 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 10:02:22,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-31 10:02:22,432 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 141 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:22,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 49 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:02:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 10:02:22,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2022-01-31 10:02:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1171875) internal successors, (143), 128 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2022-01-31 10:02:22,442 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 68 [2022-01-31 10:02:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:22,442 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2022-01-31 10:02:22,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2022-01-31 10:02:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 10:02:22,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:22,443 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:22,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:22,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:22,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:22,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1631805156, now seen corresponding path program 8 times [2022-01-31 10:02:22,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:22,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225215449] [2022-01-31 10:02:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:22,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:22,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 10:02:22,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225215449] [2022-01-31 10:02:22,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225215449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899995937] [2022-01-31 10:02:22,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:02:22,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:22,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:22,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:02:22,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 10:02:22,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:02:22,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:02:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 10:02:22,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 10:02:23,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899995937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:23,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:23,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 10:02:23,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606640373] [2022-01-31 10:02:23,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:23,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:02:23,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:02:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:02:23,050 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:23,328 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-01-31 10:02:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:02:23,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 10:02:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:23,329 INFO L225 Difference]: With dead ends: 101 [2022-01-31 10:02:23,329 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 10:02:23,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:02:23,330 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 158 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:23,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 43 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:02:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 10:02:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2022-01-31 10:02:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 76 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2022-01-31 10:02:23,332 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 70 [2022-01-31 10:02:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:23,332 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2022-01-31 10:02:23,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2022-01-31 10:02:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 10:02:23,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:23,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:23,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:23,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 10:02:23,550 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1506437006, now seen corresponding path program 9 times [2022-01-31 10:02:23,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:23,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239684549] [2022-01-31 10:02:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:23,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:26,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:26,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239684549] [2022-01-31 10:02:26,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239684549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618135006] [2022-01-31 10:02:26,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:02:26,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:26,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:26,986 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) [2022-01-31 10:02:26,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 10:02:27,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 10:02:27,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 120 conjunts are in the unsatisfiable core [2022-01-31 10:02:27,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:27,136 INFO L387 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 [2022-01-31 10:02:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:32,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:32,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:32,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:02:32,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 97 [2022-01-31 10:02:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 103 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:02:32,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:02:38,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618135006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:38,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:38,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 27, 22] total 97 [2022-01-31 10:02:38,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122273782] [2022-01-31 10:02:38,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:38,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 10:02:38,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 10:02:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=8674, Unknown=1, NotChecked=0, Total=9312 [2022-01-31 10:02:38,612 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 97 states, 97 states have (on average 2.1752577319587627) internal successors, (211), 94 states have internal predecessors, (211), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:45,627 INFO L93 Difference]: Finished difference Result 233 states and 255 transitions. [2022-01-31 10:02:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 10:02:45,627 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1752577319587627) internal successors, (211), 94 states have internal predecessors, (211), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 10:02:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:45,628 INFO L225 Difference]: With dead ends: 233 [2022-01-31 10:02:45,628 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 10:02:45,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 103 SyntacticMatches, 35 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8957 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1558, Invalid=23563, Unknown=1, NotChecked=0, Total=25122 [2022-01-31 10:02:45,630 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2013 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:45,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 306 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1968 Invalid, 0 Unknown, 2013 Unchecked, 1.1s Time] [2022-01-31 10:02:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 10:02:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 158. [2022-01-31 10:02:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1045751633986929) internal successors, (169), 153 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 173 transitions. [2022-01-31 10:02:45,634 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 173 transitions. Word has length 80 [2022-01-31 10:02:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:45,635 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 173 transitions. [2022-01-31 10:02:45,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1752577319587627) internal successors, (211), 94 states have internal predecessors, (211), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 173 transitions. [2022-01-31 10:02:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 10:02:45,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:45,636 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:45,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:45,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:45,850 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:45,851 INFO L85 PathProgramCache]: Analyzing trace with hash -243847888, now seen corresponding path program 10 times [2022-01-31 10:02:45,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:45,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656660921] [2022-01-31 10:02:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:45,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:45,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-31 10:02:45,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:45,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656660921] [2022-01-31 10:02:45,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656660921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:45,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931506022] [2022-01-31 10:02:45,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:02:45,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:45,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:45,953 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) [2022-01-31 10:02:45,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 10:02:46,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:02:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:46,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:02:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-31 10:02:46,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-31 10:02:46,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931506022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:46,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:46,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 10:02:46,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684891390] [2022-01-31 10:02:46,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:46,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 10:02:46,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:46,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 10:02:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 10:02:46,329 INFO L87 Difference]: Start difference. First operand 158 states and 173 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:46,663 INFO L93 Difference]: Finished difference Result 231 states and 242 transitions. [2022-01-31 10:02:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 10:02:46,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 10:02:46,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:46,664 INFO L225 Difference]: With dead ends: 231 [2022-01-31 10:02:46,664 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 10:02:46,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:02:46,665 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 176 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:46,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 50 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:02:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 10:02:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2022-01-31 10:02:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0859375) internal successors, (139), 128 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-01-31 10:02:46,668 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 82 [2022-01-31 10:02:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:46,668 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-01-31 10:02:46,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-01-31 10:02:46,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 10:02:46,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:46,669 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:46,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:46,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 10:02:46,879 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:46,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash 998859885, now seen corresponding path program 11 times [2022-01-31 10:02:46,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:46,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150568804] [2022-01-31 10:02:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:46,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:46,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-01-31 10:02:46,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150568804] [2022-01-31 10:02:46,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150568804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386442947] [2022-01-31 10:02:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:02:46,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:46,995 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) [2022-01-31 10:02:47,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 10:02:47,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 10:02:47,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:02:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-01-31 10:02:47,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-01-31 10:02:47,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386442947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:47,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:47,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 10:02:47,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103101792] [2022-01-31 10:02:47,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:47,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 10:02:47,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 10:02:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 10:02:47,491 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:47,891 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-01-31 10:02:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:02:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 10:02:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:47,891 INFO L225 Difference]: With dead ends: 101 [2022-01-31 10:02:47,891 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 10:02:47,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2022-01-31 10:02:47,892 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 132 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:47,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 59 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:02:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 10:02:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-01-31 10:02:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 90 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2022-01-31 10:02:47,894 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 84 [2022-01-31 10:02:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:47,894 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2022-01-31 10:02:47,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2022-01-31 10:02:47,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 10:02:47,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:47,895 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:47,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-31 10:02:48,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 10:02:48,105 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:48,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2014705021, now seen corresponding path program 12 times [2022-01-31 10:02:48,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:48,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559753361] [2022-01-31 10:02:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:48,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:53,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:53,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:53,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559753361] [2022-01-31 10:02:53,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559753361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:53,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505160276] [2022-01-31 10:02:53,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:02:53,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:53,942 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) [2022-01-31 10:02:53,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 10:02:54,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 10:02:54,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 146 conjunts are in the unsatisfiable core [2022-01-31 10:02:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:54,192 INFO L387 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 [2022-01-31 10:02:58,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:02:58,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 41 [2022-01-31 10:02:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:02:59,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:03:07,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505160276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:07,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:07,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 33, 26] total 126 [2022-01-31 10:03:07,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604883985] [2022-01-31 10:03:07,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:07,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 10:03:07,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 10:03:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=14989, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 10:03:07,925 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 126 states, 126 states have (on average 2.0) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:21,393 INFO L93 Difference]: Finished difference Result 274 states and 296 transitions. [2022-01-31 10:03:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 10:03:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 10:03:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:21,395 INFO L225 Difference]: With dead ends: 274 [2022-01-31 10:03:21,395 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 10:03:21,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 115 SyntacticMatches, 37 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17250 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=2493, Invalid=47013, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 10:03:21,400 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1465 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:21,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 284 Invalid, 3723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1918 Invalid, 0 Unknown, 1465 Unchecked, 1.2s Time] [2022-01-31 10:03:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 10:03:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 162. [2022-01-31 10:03:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.089171974522293) internal successors, (171), 157 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 175 transitions. [2022-01-31 10:03:21,404 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 175 transitions. Word has length 94 [2022-01-31 10:03:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:21,405 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 175 transitions. [2022-01-31 10:03:21,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 175 transitions. [2022-01-31 10:03:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 10:03:21,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:21,406 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:21,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:21,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 10:03:21,612 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash -792152319, now seen corresponding path program 13 times [2022-01-31 10:03:21,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:21,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154366786] [2022-01-31 10:03:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:21,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:21,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-01-31 10:03:21,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:21,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154366786] [2022-01-31 10:03:21,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154366786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:21,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265703224] [2022-01-31 10:03:21,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:03:21,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:21,750 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:21,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 10:03:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:21,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:03:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-01-31 10:03:22,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-01-31 10:03:22,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265703224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:22,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:22,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 10:03:22,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872931550] [2022-01-31 10:03:22,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:22,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:03:22,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:22,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:03:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:03:22,221 INFO L87 Difference]: Start difference. First operand 162 states and 175 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:22,617 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2022-01-31 10:03:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:03:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 10:03:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:22,619 INFO L225 Difference]: With dead ends: 246 [2022-01-31 10:03:22,619 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 10:03:22,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2022-01-31 10:03:22,619 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 271 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:22,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 47 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:03:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 10:03:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2022-01-31 10:03:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0733333333333333) internal successors, (161), 150 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 165 transitions. [2022-01-31 10:03:22,622 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 165 transitions. Word has length 96 [2022-01-31 10:03:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:22,622 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 165 transitions. [2022-01-31 10:03:22,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 165 transitions. [2022-01-31 10:03:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 10:03:22,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:22,623 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:22,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:22,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 10:03:22,835 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1919430526, now seen corresponding path program 14 times [2022-01-31 10:03:22,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934469429] [2022-01-31 10:03:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:22,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:22,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-31 10:03:22,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934469429] [2022-01-31 10:03:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934469429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396521991] [2022-01-31 10:03:22,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:03:22,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:22,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:22,976 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:22,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 10:03:23,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:03:23,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:03:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-31 10:03:23,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-31 10:03:23,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396521991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:23,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:23,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 10:03:23,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517949167] [2022-01-31 10:03:23,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:23,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:03:23,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:03:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:03:23,433 INFO L87 Difference]: Start difference. First operand 155 states and 165 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:23,900 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-01-31 10:03:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:03:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 10:03:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:23,901 INFO L225 Difference]: With dead ends: 115 [2022-01-31 10:03:23,901 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 10:03:23,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 10:03:23,901 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 231 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:23,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 59 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:03:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 10:03:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2022-01-31 10:03:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0673076923076923) internal successors, (111), 104 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2022-01-31 10:03:23,903 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 98 [2022-01-31 10:03:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:23,904 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2022-01-31 10:03:23,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2022-01-31 10:03:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 10:03:23,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:23,904 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:23,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:24,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:24,115 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:24,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1173498796, now seen corresponding path program 15 times [2022-01-31 10:03:24,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:24,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425342319] [2022-01-31 10:03:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:24,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:32,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 2 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:03:32,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:32,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425342319] [2022-01-31 10:03:32,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425342319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:32,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910702898] [2022-01-31 10:03:32,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:03:32,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:32,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:32,008 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:32,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 10:03:32,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 10:03:32,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:32,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 172 conjunts are in the unsatisfiable core [2022-01-31 10:03:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:32,223 INFO L387 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 [2022-01-31 10:03:38,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:38,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:03:38,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 101 [2022-01-31 10:03:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 7 proven. 236 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:03:39,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:03:51,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910702898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:51,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 36, 30] total 146 [2022-01-31 10:03:51,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672738329] [2022-01-31 10:03:51,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:51,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 10:03:51,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 10:03:51,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1009, Invalid=20161, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 10:03:51,355 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 146 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:04:11,550 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2022-01-31 10:04:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 10:04:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-01-31 10:04:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:04:11,552 INFO L225 Difference]: With dead ends: 202 [2022-01-31 10:04:11,552 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 10:04:11,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 135 SyntacticMatches, 39 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17860 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=3013, Invalid=55793, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 10:04:11,555 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 3257 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 5215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 3257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1590 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:04:11,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 349 Invalid, 5215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 3257 Invalid, 0 Unknown, 1590 Unchecked, 2.1s Time] [2022-01-31 10:04:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 10:04:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 156. [2022-01-31 10:04:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0728476821192052) internal successors, (162), 151 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2022-01-31 10:04:11,557 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 108 [2022-01-31 10:04:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:04:11,557 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2022-01-31 10:04:11,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2022-01-31 10:04:11,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 10:04:11,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:04:11,558 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:04:11,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 10:04:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:04:11,763 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:04:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:04:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 723298450, now seen corresponding path program 16 times [2022-01-31 10:04:11,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:04:11,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767322346] [2022-01-31 10:04:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:04:11,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:04:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:11,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:04:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-01-31 10:04:11,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:04:11,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767322346] [2022-01-31 10:04:11,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767322346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:04:11,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441901282] [2022-01-31 10:04:11,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:04:11,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:11,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:04:11,898 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:04:11,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 10:04:11,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:04:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:04:11,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:04:11,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:04:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-01-31 10:04:12,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:04:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-01-31 10:04:12,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441901282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:04:12,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:04:12,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 10:04:12,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702678451] [2022-01-31 10:04:12,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:04:12,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 10:04:12,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:04:12,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 10:04:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:04:12,477 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:04:12,941 INFO L93 Difference]: Finished difference Result 266 states and 277 transitions. [2022-01-31 10:04:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:04:12,941 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 10:04:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:04:12,942 INFO L225 Difference]: With dead ends: 266 [2022-01-31 10:04:12,942 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 10:04:12,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 10:04:12,942 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 384 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:04:12,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 41 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:04:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 10:04:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 163. [2022-01-31 10:04:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0632911392405062) internal successors, (168), 158 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2022-01-31 10:04:12,945 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 110 [2022-01-31 10:04:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:04:12,945 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2022-01-31 10:04:12,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2022-01-31 10:04:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 10:04:12,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:04:12,946 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:04:12,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-31 10:04:13,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:13,158 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:04:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:04:13,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1669496403, now seen corresponding path program 17 times [2022-01-31 10:04:13,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:04:13,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140375745] [2022-01-31 10:04:13,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:04:13,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:04:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:13,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:04:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-01-31 10:04:13,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:04:13,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140375745] [2022-01-31 10:04:13,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140375745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:04:13,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843113055] [2022-01-31 10:04:13,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:04:13,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:13,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:04:13,305 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:04:13,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 10:04:13,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:04:13,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:04:13,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:04:13,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:04:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-01-31 10:04:13,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:04:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-01-31 10:04:14,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843113055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:04:14,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:04:14,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 10:04:14,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627105191] [2022-01-31 10:04:14,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:04:14,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 10:04:14,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:04:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 10:04:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:04:14,117 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:04:14,628 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2022-01-31 10:04:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 10:04:14,629 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 10:04:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:04:14,629 INFO L225 Difference]: With dead ends: 129 [2022-01-31 10:04:14,629 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 10:04:14,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 10:04:14,630 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 235 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:04:14,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 65 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:04:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 10:04:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2022-01-31 10:04:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 118 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2022-01-31 10:04:14,632 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 114 [2022-01-31 10:04:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:04:14,632 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2022-01-31 10:04:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2022-01-31 10:04:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 10:04:14,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:04:14,633 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:04:14,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 10:04:14,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:14,836 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:04:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:04:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash -315480603, now seen corresponding path program 18 times [2022-01-31 10:04:14,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:04:14,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758437310] [2022-01-31 10:04:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:04:14,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:04:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:26,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:04:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 20 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:04:26,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:04:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758437310] [2022-01-31 10:04:26,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758437310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:04:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532175493] [2022-01-31 10:04:26,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:04:26,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:26,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:04:26,209 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:04:26,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 10:04:26,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 10:04:26,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:04:26,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 198 conjunts are in the unsatisfiable core [2022-01-31 10:04:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:04:26,554 INFO L387 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 [2022-01-31 10:04:39,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:39,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:04:39,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 96 treesize of output 249 [2022-01-31 10:04:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 11 proven. 307 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:04:39,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:04:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 10:04:54,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532175493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:04:54,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:04:54,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 39, 34] total 169 [2022-01-31 10:04:54,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515251194] [2022-01-31 10:04:54,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:04:54,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-01-31 10:04:54,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:04:54,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-01-31 10:04:54,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1284, Invalid=27107, Unknown=1, NotChecked=0, Total=28392 [2022-01-31 10:04:54,863 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 169 states, 169 states have (on average 1.9230769230769231) internal successors, (325), 166 states have internal predecessors, (325), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:05:29,363 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2022-01-31 10:05:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 10:05:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 1.9230769230769231) internal successors, (325), 166 states have internal predecessors, (325), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 10:05:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:05:29,364 INFO L225 Difference]: With dead ends: 228 [2022-01-31 10:05:29,364 INFO L226 Difference]: Without dead ends: 225 [2022-01-31 10:05:29,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 156 SyntacticMatches, 36 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 25482 ImplicationChecksByTransitivity, 62.8s TimeCoverageRelationStatistics Valid=4120, Invalid=80269, Unknown=1, NotChecked=0, Total=84390 [2022-01-31 10:05:29,368 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 3250 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 5181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 3250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1545 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:05:29,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 403 Invalid, 5181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 3250 Invalid, 0 Unknown, 1545 Unchecked, 2.2s Time] [2022-01-31 10:05:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-31 10:05:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 176. [2022-01-31 10:05:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.064327485380117) internal successors, (182), 171 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 186 transitions. [2022-01-31 10:05:29,371 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 186 transitions. Word has length 122 [2022-01-31 10:05:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:05:29,371 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 186 transitions. [2022-01-31 10:05:29,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 1.9230769230769231) internal successors, (325), 166 states have internal predecessors, (325), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 186 transitions. [2022-01-31 10:05:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 10:05:29,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:05:29,372 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:05:29,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-31 10:05:29,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:05:29,590 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:05:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:05:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1225248285, now seen corresponding path program 19 times [2022-01-31 10:05:29,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:05:29,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203950096] [2022-01-31 10:05:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:05:29,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:05:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:29,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:05:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-01-31 10:05:29,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:05:29,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203950096] [2022-01-31 10:05:29,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203950096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:05:29,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788750499] [2022-01-31 10:05:29,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:05:29,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:05:29,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:05:29,752 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:05:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:05:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:29,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:05:29,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:05:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-01-31 10:05:30,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:05:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-01-31 10:05:30,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788750499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:05:30,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:05:30,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 10:05:30,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635756826] [2022-01-31 10:05:30,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:05:30,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:05:30,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:05:30,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:05:30,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:05:30,319 INFO L87 Difference]: Start difference. First operand 176 states and 186 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:05:30,826 INFO L93 Difference]: Finished difference Result 298 states and 309 transitions. [2022-01-31 10:05:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:05:30,827 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-01-31 10:05:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:05:30,828 INFO L225 Difference]: With dead ends: 298 [2022-01-31 10:05:30,828 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 10:05:30,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 10:05:30,829 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 395 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:05:30,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 43 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:05:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 10:05:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 183. [2022-01-31 10:05:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0561797752808988) internal successors, (188), 178 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 192 transitions. [2022-01-31 10:05:30,842 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 192 transitions. Word has length 124 [2022-01-31 10:05:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:05:30,842 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 192 transitions. [2022-01-31 10:05:30,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 192 transitions. [2022-01-31 10:05:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 10:05:30,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:05:30,843 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:05:30,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-31 10:05:31,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:05:31,060 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:05:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:05:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1567294466, now seen corresponding path program 20 times [2022-01-31 10:05:31,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:05:31,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854811602] [2022-01-31 10:05:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:05:31,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:05:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:31,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:05:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-01-31 10:05:31,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:05:31,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854811602] [2022-01-31 10:05:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854811602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:05:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765396017] [2022-01-31 10:05:31,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:05:31,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:05:31,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:05:31,235 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:05:31,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:05:31,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:05:31,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:05:31,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:05:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:05:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-01-31 10:05:31,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:05:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-01-31 10:05:31,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765396017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:05:31,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:05:31,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 10:05:31,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413107392] [2022-01-31 10:05:31,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:05:31,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:05:31,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:05:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:05:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:05:31,797 INFO L87 Difference]: Start difference. First operand 183 states and 192 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:05:32,387 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2022-01-31 10:05:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:05:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-01-31 10:05:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:05:32,388 INFO L225 Difference]: With dead ends: 143 [2022-01-31 10:05:32,388 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 10:05:32,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=447, Invalid=1715, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 10:05:32,391 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 249 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:05:32,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 59 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:05:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 10:05:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-01-31 10:05:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.053030303030303) internal successors, (139), 132 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2022-01-31 10:05:32,394 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 128 [2022-01-31 10:05:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:05:32,394 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2022-01-31 10:05:32,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:05:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2022-01-31 10:05:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 10:05:32,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:05:32,395 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:05:32,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 10:05:32,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 10:05:32,615 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:05:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:05:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -948687050, now seen corresponding path program 21 times [2022-01-31 10:05:32,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:05:32,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325078142] [2022-01-31 10:05:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:05:32,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:05:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:48,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:05:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 30 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:05:48,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:05:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325078142] [2022-01-31 10:05:48,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325078142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:05:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738418854] [2022-01-31 10:05:48,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:05:48,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:05:48,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:05:48,392 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:05:48,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:05:48,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 10:05:48,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:05:48,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 224 conjunts are in the unsatisfiable core [2022-01-31 10:05:48,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:05:48,802 INFO L387 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 [2022-01-31 10:06:08,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:08,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:06:08,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 169 [2022-01-31 10:06:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 9 proven. 423 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:06:08,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 399 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:06:31,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738418854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:31,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:06:31,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 45, 38] total 197 [2022-01-31 10:06:31,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159649006] [2022-01-31 10:06:31,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:31,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2022-01-31 10:06:31,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:31,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2022-01-31 10:06:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=37120, Unknown=2, NotChecked=0, Total=38612 [2022-01-31 10:06:31,789 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand has 197 states, 197 states have (on average 1.8578680203045685) internal successors, (366), 194 states have internal predecessors, (366), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:14,609 INFO L93 Difference]: Finished difference Result 254 states and 267 transitions. [2022-01-31 10:07:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 10:07:14,609 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.8578680203045685) internal successors, (366), 194 states have internal predecessors, (366), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-01-31 10:07:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:14,610 INFO L225 Difference]: With dead ends: 254 [2022-01-31 10:07:14,610 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 10:07:14,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 175 SyntacticMatches, 32 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 32186 ImplicationChecksByTransitivity, 84.7s TimeCoverageRelationStatistics Valid=4908, Invalid=104982, Unknown=2, NotChecked=0, Total=109892 [2022-01-31 10:07:14,615 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 5416 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 9234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 5416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3270 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:14,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 487 Invalid, 9234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 5416 Invalid, 0 Unknown, 3270 Unchecked, 3.6s Time] [2022-01-31 10:07:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 10:07:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2022-01-31 10:07:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.057591623036649) internal successors, (202), 191 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 206 transitions. [2022-01-31 10:07:14,618 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 206 transitions. Word has length 136 [2022-01-31 10:07:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:14,618 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 206 transitions. [2022-01-31 10:07:14,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.8578680203045685) internal successors, (366), 194 states have internal predecessors, (366), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 206 transitions. [2022-01-31 10:07:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 10:07:14,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:14,619 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:07:14,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:07:14,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 10:07:14,835 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1922268428, now seen corresponding path program 22 times [2022-01-31 10:07:14,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:14,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577583399] [2022-01-31 10:07:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:14,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:15,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:07:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-01-31 10:07:15,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:15,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577583399] [2022-01-31 10:07:15,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577583399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:07:15,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460933333] [2022-01-31 10:07:15,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:07:15,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:15,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:15,029 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:07:15,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 10:07:15,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:07:15,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:07:15,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:07:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-01-31 10:07:15,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-01-31 10:07:15,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460933333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:15,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:07:15,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 10:07:15,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234858029] [2022-01-31 10:07:15,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:07:15,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:07:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:07:15,681 INFO L87 Difference]: Start difference. First operand 196 states and 206 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 32 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:16,264 INFO L93 Difference]: Finished difference Result 330 states and 341 transitions. [2022-01-31 10:07:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 10:07:16,264 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 32 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 10:07:16,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:16,265 INFO L225 Difference]: With dead ends: 330 [2022-01-31 10:07:16,265 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 10:07:16,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 10:07:16,265 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 464 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:16,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 43 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 10:07:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 10:07:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 203. [2022-01-31 10:07:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0505050505050506) internal successors, (208), 198 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 212 transitions. [2022-01-31 10:07:16,268 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 212 transitions. Word has length 138 [2022-01-31 10:07:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:16,268 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 212 transitions. [2022-01-31 10:07:16,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 32 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 212 transitions. [2022-01-31 10:07:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 10:07:16,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:16,269 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:07:16,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 10:07:16,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:16,482 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash 342826511, now seen corresponding path program 23 times [2022-01-31 10:07:16,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:16,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933340032] [2022-01-31 10:07:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:16,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:07:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-01-31 10:07:16,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:16,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933340032] [2022-01-31 10:07:16,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933340032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:07:16,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006454210] [2022-01-31 10:07:16,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:07:16,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:16,700 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:07:16,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 10:07:17,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-31 10:07:17,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:07:17,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:07:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-01-31 10:07:17,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-01-31 10:07:17,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006454210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:17,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:07:17,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 10:07:17,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974639029] [2022-01-31 10:07:17,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:17,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:07:17,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:17,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:07:17,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:07:17,514 INFO L87 Difference]: Start difference. First operand 203 states and 212 transitions. Second operand has 33 states, 33 states have (on average 3.9696969696969697) internal successors, (131), 32 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:18,217 INFO L93 Difference]: Finished difference Result 157 states and 163 transitions. [2022-01-31 10:07:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 10:07:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9696969696969697) internal successors, (131), 32 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 10:07:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:18,218 INFO L225 Difference]: With dead ends: 157 [2022-01-31 10:07:18,218 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 10:07:18,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 283 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=2107, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 10:07:18,219 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 381 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:18,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 45 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 10:07:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 10:07:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2022-01-31 10:07:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.047945205479452) internal successors, (153), 146 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2022-01-31 10:07:18,221 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 142 [2022-01-31 10:07:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:18,221 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2022-01-31 10:07:18,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9696969696969697) internal successors, (131), 32 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2022-01-31 10:07:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 10:07:18,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:18,222 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:07:18,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 10:07:18,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:18,423 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:18,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1350754233, now seen corresponding path program 24 times [2022-01-31 10:07:18,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:18,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128657951] [2022-01-31 10:07:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:18,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:36,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:07:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 30 proven. 537 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:07:36,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:36,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128657951] [2022-01-31 10:07:36,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128657951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:07:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5784163] [2022-01-31 10:07:36,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:07:36,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:36,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:36,792 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:07:36,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 10:07:36,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-31 10:07:36,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:07:36,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 252 conjunts are in the unsatisfiable core [2022-01-31 10:07:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:37,604 INFO L387 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 [2022-01-31 10:07:37,614 INFO L387 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 [2022-01-31 10:07:50,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:50,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:07:50,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2022-01-31 10:07:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 5 proven. 558 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:07:51,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 503 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:08:16,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5784163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:16,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:08:16,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 52, 42] total 217 [2022-01-31 10:08:16,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003996144] [2022-01-31 10:08:16,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:16,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 217 states [2022-01-31 10:08:16,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2022-01-31 10:08:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2288, Invalid=44584, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 10:08:16,843 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand has 217 states, 217 states have (on average 1.8894009216589862) internal successors, (410), 214 states have internal predecessors, (410), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:09:06,226 INFO L93 Difference]: Finished difference Result 304 states and 320 transitions. [2022-01-31 10:09:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-01-31 10:09:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 217 states, 217 states have (on average 1.8894009216589862) internal successors, (410), 214 states have internal predecessors, (410), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 10:09:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:09:06,227 INFO L225 Difference]: With dead ends: 304 [2022-01-31 10:09:06,228 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 10:09:06,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 183 SyntacticMatches, 51 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 57470 ImplicationChecksByTransitivity, 86.1s TimeCoverageRelationStatistics Valid=7417, Invalid=136603, Unknown=0, NotChecked=0, Total=144020 [2022-01-31 10:09:06,233 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 5534 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 10514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 5534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3974 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:09:06,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 399 Invalid, 10514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1006 Valid, 5534 Invalid, 0 Unknown, 3974 Unchecked, 4.3s Time] [2022-01-31 10:09:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 10:09:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 216. [2022-01-31 10:09:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.052132701421801) internal successors, (222), 211 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 226 transitions. [2022-01-31 10:09:06,236 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 226 transitions. Word has length 150 [2022-01-31 10:09:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:09:06,236 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 226 transitions. [2022-01-31 10:09:06,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 217 states, 217 states have (on average 1.8894009216589862) internal successors, (410), 214 states have internal predecessors, (410), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 226 transitions. [2022-01-31 10:09:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 10:09:06,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:09:06,237 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:09:06,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 10:09:06,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 10:09:06,454 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:09:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:09:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 890686405, now seen corresponding path program 25 times [2022-01-31 10:09:06,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:09:06,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883811267] [2022-01-31 10:09:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:06,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:09:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:06,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:09:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-01-31 10:09:06,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:09:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883811267] [2022-01-31 10:09:06,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883811267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:09:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674924084] [2022-01-31 10:09:06,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:09:06,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:09:06,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:09:06,673 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:09:06,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 10:09:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:06,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 10:09:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:09:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-01-31 10:09:07,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:09:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-01-31 10:09:07,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674924084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:09:07,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:09:07,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 10:09:07,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398009513] [2022-01-31 10:09:07,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:09:07,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:09:07,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:09:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:09:07,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 10:09:07,445 INFO L87 Difference]: Start difference. First operand 216 states and 226 transitions. Second operand has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 35 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:09:08,179 INFO L93 Difference]: Finished difference Result 362 states and 373 transitions. [2022-01-31 10:09:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:09:08,179 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 35 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-01-31 10:09:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:09:08,180 INFO L225 Difference]: With dead ends: 362 [2022-01-31 10:09:08,180 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 10:09:08,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=492, Invalid=1670, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 10:09:08,180 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 481 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:09:08,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 51 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 10:09:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 10:09:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2022-01-31 10:09:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0458715596330275) internal successors, (228), 218 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 232 transitions. [2022-01-31 10:09:08,183 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 232 transitions. Word has length 152 [2022-01-31 10:09:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:09:08,183 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 232 transitions. [2022-01-31 10:09:08,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 35 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 232 transitions. [2022-01-31 10:09:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 10:09:08,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:09:08,184 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:09:08,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 10:09:08,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 10:09:08,385 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:09:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:09:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash 124852192, now seen corresponding path program 26 times [2022-01-31 10:09:08,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:09:08,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837331868] [2022-01-31 10:09:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:08,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:09:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:09:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-01-31 10:09:08,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:09:08,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837331868] [2022-01-31 10:09:08,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837331868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:09:08,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884712750] [2022-01-31 10:09:08,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:09:08,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:09:08,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:09:08,608 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:09:08,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 10:09:08,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:09:08,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:09:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 10:09:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:09:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-01-31 10:09:09,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:09:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-01-31 10:09:09,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884712750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:09:09,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:09:09,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 10:09:09,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164460864] [2022-01-31 10:09:09,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:09:09,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:09:09,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:09:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:09:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 10:09:09,317 INFO L87 Difference]: Start difference. First operand 223 states and 232 transitions. Second operand has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 35 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:09:10,073 INFO L93 Difference]: Finished difference Result 171 states and 177 transitions. [2022-01-31 10:09:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 10:09:10,073 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 35 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-01-31 10:09:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:09:10,074 INFO L225 Difference]: With dead ends: 171 [2022-01-31 10:09:10,074 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 10:09:10,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=653, Invalid=2539, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 10:09:10,075 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 322 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:09:10,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 65 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 10:09:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 10:09:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2022-01-31 10:09:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.04375) internal successors, (167), 160 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 171 transitions. [2022-01-31 10:09:10,077 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 171 transitions. Word has length 156 [2022-01-31 10:09:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:09:10,077 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 171 transitions. [2022-01-31 10:09:10,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 35 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:09:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 171 transitions. [2022-01-31 10:09:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 10:09:10,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:09:10,078 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:09:10,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-31 10:09:10,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 10:09:10,299 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:09:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:09:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1468147992, now seen corresponding path program 27 times [2022-01-31 10:09:10,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:09:10,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494232852] [2022-01-31 10:09:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:10,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:09:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:09:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 65 proven. 635 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:09:37,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:09:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494232852] [2022-01-31 10:09:37,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494232852] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:09:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976511342] [2022-01-31 10:09:37,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:09:37,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:09:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:09:37,503 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:09:37,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 10:09:37,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 10:09:37,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:09:37,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 289 conjunts are in the unsatisfiable core [2022-01-31 10:09:37,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:09:38,019 INFO L387 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 [2022-01-31 10:09:38,174 INFO L387 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 [2022-01-31 10:09:38,310 INFO L387 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 [2022-01-31 10:09:38,318 INFO L387 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 [2022-01-31 10:09:38,330 INFO L387 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 [2022-01-31 10:09:38,339 INFO L387 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 [2022-01-31 10:09:38,350 INFO L387 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 [2022-01-31 10:10:20,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:20,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:10:20,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 90 treesize of output 243 [2022-01-31 10:10:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 10 proven. 670 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 10:10:22,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:50,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-01-31 10:10:50,180 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-31 10:10:50,181 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-31 10:10:50,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:50,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:50,382 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 47 more [2022-01-31 10:10:50,386 INFO L158 Benchmark]: Toolchain (without parser) took 589602.00ms. Allocated memory was 187.7MB in the beginning and 746.6MB in the end (delta: 558.9MB). Free memory was 139.2MB in the beginning and 490.4MB in the end (delta: -351.3MB). Peak memory consumption was 208.9MB. Max. memory is 8.0GB. [2022-01-31 10:10:50,386 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 187.7MB. Free memory was 155.5MB in the beginning and 155.4MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 10:10:50,386 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.21ms. Allocated memory is still 187.7MB. Free memory was 138.9MB in the beginning and 165.0MB in the end (delta: -26.1MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. [2022-01-31 10:10:50,386 INFO L158 Benchmark]: Boogie Preprocessor took 22.33ms. Allocated memory is still 187.7MB. Free memory was 165.0MB in the beginning and 163.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 10:10:50,386 INFO L158 Benchmark]: RCFGBuilder took 307.55ms. Allocated memory is still 187.7MB. Free memory was 163.4MB in the beginning and 150.3MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 10:10:50,386 INFO L158 Benchmark]: IcfgTransformer took 54.42ms. Allocated memory is still 187.7MB. Free memory was 150.3MB in the beginning and 149.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 10:10:50,387 INFO L158 Benchmark]: TraceAbstraction took 589039.88ms. Allocated memory was 187.7MB in the beginning and 746.6MB in the end (delta: 558.9MB). Free memory was 148.7MB in the beginning and 490.4MB in the end (delta: -341.7MB). Peak memory consumption was 218.0MB. Max. memory is 8.0GB. [2022-01-31 10:10:50,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 187.7MB. Free memory was 155.5MB in the beginning and 155.4MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 174.21ms. Allocated memory is still 187.7MB. Free memory was 138.9MB in the beginning and 165.0MB in the end (delta: -26.1MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.33ms. Allocated memory is still 187.7MB. Free memory was 165.0MB in the beginning and 163.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 307.55ms. Allocated memory is still 187.7MB. Free memory was 163.4MB in the beginning and 150.3MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 54.42ms. Allocated memory is still 187.7MB. Free memory was 150.3MB in the beginning and 149.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 589039.88ms. Allocated memory was 187.7MB in the beginning and 746.6MB in the end (delta: 558.9MB). Free memory was 148.7MB in the beginning and 490.4MB in the end (delta: -341.7MB). Peak memory consumption was 218.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...