/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-fpi/condn.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 11:04:30,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 11:04:30,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 11:04:30,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 11:04:30,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 11:04:30,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 11:04:30,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 11:04:30,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 11:04:30,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 11:04:30,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 11:04:30,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 11:04:30,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 11:04:30,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 11:04:30,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 11:04:30,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 11:04:30,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 11:04:30,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 11:04:30,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 11:04:30,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 11:04:30,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 11:04:30,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 11:04:30,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 11:04:30,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 11:04:30,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 11:04:30,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 11:04:30,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 11:04:30,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 11:04:30,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 11:04:30,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 11:04:30,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 11:04:30,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 11:04:30,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 11:04:30,524 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 11:04:30,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 11:04:30,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 11:04:30,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 11:04:30,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 11:04:30,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 11:04:30,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 11:04:30,525 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 11:04:30,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 11:04:30,525 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 11:04:30,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 11:04:30,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 11:04:30,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 11:04:30,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 11:04:30,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 11:04:30,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:04:30,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 11:04:30,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 11:04:30,526 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 11:04:30,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 11:04:30,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 11:04:30,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 11:04:30,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 11:04:30,739 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 11:04:30,751 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 11:04:30,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condn.c [2022-01-31 11:04:30,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b046d15d9/13b4b26700f84e8884eaf111930910c8/FLAG8bc13b91f [2022-01-31 11:04:31,104 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 11:04:31,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condn.c [2022-01-31 11:04:31,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b046d15d9/13b4b26700f84e8884eaf111930910c8/FLAG8bc13b91f [2022-01-31 11:04:31,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b046d15d9/13b4b26700f84e8884eaf111930910c8 [2022-01-31 11:04:31,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 11:04:31,563 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 11:04:31,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 11:04:31,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 11:04:31,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 11:04:31,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@776243db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31, skipping insertion in model container [2022-01-31 11:04:31,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 11:04:31,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 11:04:31,716 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-fpi/condn.c[588,601] [2022-01-31 11:04:31,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:04:31,738 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 11:04:31,747 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-fpi/condn.c[588,601] [2022-01-31 11:04:31,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:04:31,771 INFO L208 MainTranslator]: Completed translation [2022-01-31 11:04:31,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31 WrapperNode [2022-01-31 11:04:31,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 11:04:31,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 11:04:31,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 11:04:31,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 11:04:31,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 11:04:31,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 11:04:31,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 11:04:31,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 11:04:31,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (1/1) ... [2022-01-31 11:04:31,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:04:31,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:04:31,837 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 11:04:31,878 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 11:04:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 11:04:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 11:04:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 11:04:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 11:04:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 11:04:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 11:04:31,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 11:04:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 11:04:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 11:04:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 11:04:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 11:04:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 11:04:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 11:04:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 11:04:31,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 11:04:31,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 11:04:31,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 11:04:31,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 11:04:31,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 11:04:31,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 11:04:31,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 11:04:31,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 11:04:31,959 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 11:04:31,961 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 11:04:32,131 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 11:04:32,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 11:04:32,136 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 11:04:32,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:04:32 BoogieIcfgContainer [2022-01-31 11:04:32,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 11:04:32,139 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 11:04:32,139 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 11:04:32,140 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 11:04:32,157 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:04:32" (1/1) ... [2022-01-31 11:04:32,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:04:32 BasicIcfg [2022-01-31 11:04:32,180 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 11:04:32,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 11:04:32,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 11:04:32,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 11:04:32,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:04:31" (1/4) ... [2022-01-31 11:04:32,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7701b14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:04:32, skipping insertion in model container [2022-01-31 11:04:32,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:04:31" (2/4) ... [2022-01-31 11:04:32,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7701b14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:04:32, skipping insertion in model container [2022-01-31 11:04:32,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:04:32" (3/4) ... [2022-01-31 11:04:32,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7701b14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:04:32, skipping insertion in model container [2022-01-31 11:04:32,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:04:32" (4/4) ... [2022-01-31 11:04:32,189 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.cJordan [2022-01-31 11:04:32,193 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 11:04:32,194 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 11:04:32,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 11:04:32,240 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 11:04:32,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 11:04:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:04:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 11:04:32,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:32,259 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] [2022-01-31 11:04:32,259 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash 75395733, now seen corresponding path program 1 times [2022-01-31 11:04:32,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:32,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453362371] [2022-01-31 11:04:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:32,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,475 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 11:04:32,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453362371] [2022-01-31 11:04:32,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453362371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:04:32,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:04:32,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 11:04:32,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144626239] [2022-01-31 11:04:32,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:04:32,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 11:04:32,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:04:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 11:04:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:04:32,502 INFO L87 Difference]: Start difference. First operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:04:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:04:32,557 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 11:04:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 11:04:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 11:04:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:04:32,563 INFO L225 Difference]: With dead ends: 35 [2022-01-31 11:04:32,564 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 11:04:32,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 11:04:32,568 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:04:32,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:04:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 11:04:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 11:04:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 11:04:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 11:04:32,593 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2022-01-31 11:04:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:04:32,594 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 11:04:32,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:04:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 11:04:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 11:04:32,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:32,595 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] [2022-01-31 11:04:32,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 11:04:32,595 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2025461737, now seen corresponding path program 1 times [2022-01-31 11:04:32,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:32,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973276613] [2022-01-31 11:04:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:32,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,668 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 11:04:32,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973276613] [2022-01-31 11:04:32,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973276613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:04:32,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:04:32,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 11:04:32,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321052892] [2022-01-31 11:04:32,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:04:32,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 11:04:32,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:04:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 11:04:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 11:04:32,671 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:04:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:04:32,730 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-01-31 11:04:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 11:04:32,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 11:04:32,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:04:32,732 INFO L225 Difference]: With dead ends: 39 [2022-01-31 11:04:32,733 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 11:04:32,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 11:04:32,734 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:04:32,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 31 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:04:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 11:04:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-01-31 11:04:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 11:04:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-31 11:04:32,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2022-01-31 11:04:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:04:32,740 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-31 11:04:32,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:04:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-31 11:04:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 11:04:32,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:32,740 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] [2022-01-31 11:04:32,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 11:04:32,741 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:32,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1101033, now seen corresponding path program 1 times [2022-01-31 11:04:32,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:32,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331500430] [2022-01-31 11:04:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:32,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:04:32,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:32,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331500430] [2022-01-31 11:04:32,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331500430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:04:32,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722610348] [2022-01-31 11:04:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:32,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:32,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:04:32,906 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 11:04:32,907 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 11:04:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:32,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 11:04:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:04:33,070 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 0 case distinctions, treesize of input 26 treesize of output 14 [2022-01-31 11:04:33,106 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 17 treesize of output 9 [2022-01-31 11:04:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:04:33,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:04:33,268 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 37 treesize of output 31 [2022-01-31 11:04:33,275 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 11:04:33,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 32 [2022-01-31 11:04:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:04:33,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722610348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:04:33,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:04:33,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 19 [2022-01-31 11:04:33,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912240898] [2022-01-31 11:04:33,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:04:33,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 11:04:33,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:04:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 11:04:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-31 11:04:33,317 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:04:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:04:33,625 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-01-31 11:04:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 11:04:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-01-31 11:04:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:04:33,626 INFO L225 Difference]: With dead ends: 57 [2022-01-31 11:04:33,626 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 11:04:33,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-31 11:04:33,627 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:04:33,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 135 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 357 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-01-31 11:04:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 11:04:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2022-01-31 11:04:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:04:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-01-31 11:04:33,661 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 27 [2022-01-31 11:04:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:04:33,661 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-01-31 11:04:33,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:04:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-01-31 11:04:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 11:04:33,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:33,662 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-01-31 11:04:33,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 11:04:33,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:33,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:33,881 INFO L85 PathProgramCache]: Analyzing trace with hash 774906141, now seen corresponding path program 1 times [2022-01-31 11:04:33,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:33,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058552345] [2022-01-31 11:04:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:33,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:33,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:33,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 11:04:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:04:33,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:33,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058552345] [2022-01-31 11:04:33,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058552345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:04:33,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938357400] [2022-01-31 11:04:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:33,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:33,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:04:33,976 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 11:04:33,977 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 11:04:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:34,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:04:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:04:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:04:34,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:04:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:04:34,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938357400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:04:34,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:04:34,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 11:04:34,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416625060] [2022-01-31 11:04:34,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:04:34,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:04:34,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:04:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:04:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:04:34,156 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 11:04:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:04:34,290 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-01-31 11:04:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 11:04:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2022-01-31 11:04:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:04:34,292 INFO L225 Difference]: With dead ends: 68 [2022-01-31 11:04:34,292 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 11:04:34,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-31 11:04:34,293 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:04:34,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 65 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:04:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 11:04:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2022-01-31 11:04:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:04:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-01-31 11:04:34,297 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 35 [2022-01-31 11:04:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:04:34,297 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-01-31 11:04:34,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 11:04:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-01-31 11:04:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 11:04:34,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:34,298 INFO L514 BasicCegarLoop]: trace histogram [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 11:04:34,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 11:04:34,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 11:04:34,512 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2137660349, now seen corresponding path program 2 times [2022-01-31 11:04:34,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:34,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944084935] [2022-01-31 11:04:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:34,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:34,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:34,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 11:04:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:04:34,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944084935] [2022-01-31 11:04:34,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944084935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:04:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201029383] [2022-01-31 11:04:34,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:04:34,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:34,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:04:34,731 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 11:04:34,747 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 11:04:34,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:04:34,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:04:34,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 11:04:34,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:04:34,842 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:04:36,973 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 21 treesize of output 9 [2022-01-31 11:04:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 11:04:37,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:04:39,248 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 39 treesize of output 33 [2022-01-31 11:04:39,261 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 11:04:39,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2022-01-31 11:04:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 11:04:39,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201029383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:04:39,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:04:39,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 28 [2022-01-31 11:04:39,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014918953] [2022-01-31 11:04:39,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:04:39,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 11:04:39,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:04:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 11:04:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=662, Unknown=2, NotChecked=0, Total=756 [2022-01-31 11:04:39,296 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 11:04:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:04:44,039 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-01-31 11:04:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 11:04:44,040 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-01-31 11:04:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:04:44,041 INFO L225 Difference]: With dead ends: 74 [2022-01-31 11:04:44,041 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 11:04:44,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=300, Invalid=1952, Unknown=4, NotChecked=0, Total=2256 [2022-01-31 11:04:44,042 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 92 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:04:44,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 167 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 537 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-01-31 11:04:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 11:04:44,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2022-01-31 11:04:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 11:04:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-01-31 11:04:44,046 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 40 [2022-01-31 11:04:44,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:04:44,047 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-01-31 11:04:44,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 11:04:44,047 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-01-31 11:04:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 11:04:44,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:44,048 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 11:04:44,069 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 11:04:44,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:44,269 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:44,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1614987657, now seen corresponding path program 3 times [2022-01-31 11:04:44,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:44,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795915544] [2022-01-31 11:04:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:44,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:44,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:44,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:44,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 11:04:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:44,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 11:04:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 11:04:44,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:44,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795915544] [2022-01-31 11:04:44,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795915544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:04:44,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438719163] [2022-01-31 11:04:44,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:04:44,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:44,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:04:44,392 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 11:04:44,393 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 11:04:44,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 11:04:44,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:04:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 11:04:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:04:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 11:04:44,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:04:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 11:04:44,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438719163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:04:44,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:04:44,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 11:04:44,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891934609] [2022-01-31 11:04:44,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:04:44,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 11:04:44,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:04:44,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 11:04:44,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 11:04:44,648 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 11:04:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:04:44,801 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2022-01-31 11:04:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 11:04:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2022-01-31 11:04:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:04:44,803 INFO L225 Difference]: With dead ends: 92 [2022-01-31 11:04:44,803 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 11:04:44,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 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 11:04:44,804 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:04:44,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 67 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:04:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 11:04:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2022-01-31 11:04:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 11:04:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-01-31 11:04:44,808 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 48 [2022-01-31 11:04:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:04:44,808 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-01-31 11:04:44,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 11:04:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-01-31 11:04:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 11:04:44,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:44,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:04:44,832 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 11:04:45,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:45,033 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 63644505, now seen corresponding path program 4 times [2022-01-31 11:04:45,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970804892] [2022-01-31 11:04:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:45,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:45,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:45,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:45,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 11:04:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:45,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 11:04:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 11:04:45,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970804892] [2022-01-31 11:04:45,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970804892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:04:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101743624] [2022-01-31 11:04:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:04:45,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:04:45,446 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 11:04:45,487 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 11:04:45,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:04:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:04:45,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 11:04:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:04:45,600 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 0 case distinctions, treesize of input 32 treesize of output 16 [2022-01-31 11:04:45,826 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 19 treesize of output 7 [2022-01-31 11:04:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 11:04:45,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:04:48,054 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 39 treesize of output 33 [2022-01-31 11:04:48,058 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 11:04:48,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2022-01-31 11:04:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 11:04:48,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101743624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:04:48,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:04:48,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 13] total 38 [2022-01-31 11:04:48,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816658621] [2022-01-31 11:04:48,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:04:48,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 11:04:48,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:04:48,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 11:04:48,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1252, Unknown=1, NotChecked=0, Total=1406 [2022-01-31 11:04:48,103 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 38 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 11:04:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:04:51,089 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-01-31 11:04:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 11:04:51,089 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 53 [2022-01-31 11:04:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:04:51,090 INFO L225 Difference]: With dead ends: 101 [2022-01-31 11:04:51,090 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 11:04:51,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=409, Invalid=3011, Unknown=2, NotChecked=0, Total=3422 [2022-01-31 11:04:51,092 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 90 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 11:04:51,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 379 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1477 Invalid, 0 Unknown, 160 Unchecked, 0.6s Time] [2022-01-31 11:04:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 11:04:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 64. [2022-01-31 11:04:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 11:04:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-01-31 11:04:51,097 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 53 [2022-01-31 11:04:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:04:51,098 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-01-31 11:04:51,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 11:04:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-01-31 11:04:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 11:04:51,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:51,099 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 11:04:51,130 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 11:04:51,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:51,333 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1289418867, now seen corresponding path program 5 times [2022-01-31 11:04:51,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:51,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951002943] [2022-01-31 11:04:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:51,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:51,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:51,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:51,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 11:04:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:51,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 11:04:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:51,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 11:04:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 11:04:51,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951002943] [2022-01-31 11:04:51,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951002943] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:04:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25446130] [2022-01-31 11:04:51,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:04:51,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:51,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:04:51,456 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 11:04:51,476 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 11:04:51,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 11:04:51,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:04:51,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 11:04:51,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:04:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 11:04:51,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:04:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 11:04:51,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25446130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:04:51,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:04:51,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 11:04:51,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628984910] [2022-01-31 11:04:51,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:04:51,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 11:04:51,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:04:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 11:04:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 11:04:51,870 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 11:04:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:04:52,091 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-01-31 11:04:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 11:04:52,092 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), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 61 [2022-01-31 11:04:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:04:52,093 INFO L225 Difference]: With dead ends: 116 [2022-01-31 11:04:52,093 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 11:04:52,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 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 11:04:52,094 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:04:52,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 85 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:04:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 11:04:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2022-01-31 11:04:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 56 states have internal predecessors, (62), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 11:04:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-01-31 11:04:52,098 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 61 [2022-01-31 11:04:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:04:52,098 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-01-31 11:04:52,098 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), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 11:04:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-01-31 11:04:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 11:04:52,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:04:52,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:04:52,134 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 11:04:52,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:52,311 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:04:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:04:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1615661731, now seen corresponding path program 6 times [2022-01-31 11:04:52,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:04:52,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706543850] [2022-01-31 11:04:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:04:52,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:04:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:52,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:04:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:52,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:04:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:52,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 11:04:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:52,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 11:04:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:52,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 11:04:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:04:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:04:52,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:04:52,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706543850] [2022-01-31 11:04:52,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706543850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:04:52,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535093364] [2022-01-31 11:04:52,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 11:04:52,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:04:52,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:04:52,666 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 11:04:52,709 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 11:04:52,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 11:04:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:04:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 11:04:52,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:04:52,922 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:05:07,809 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 11:05:07,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-31 11:05:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 11:05:07,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:07,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535093364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:05:07,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:05:07,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2022-01-31 11:05:07,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035189214] [2022-01-31 11:05:07,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:07,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 11:05:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 11:05:07,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1673, Unknown=3, NotChecked=0, Total=1892 [2022-01-31 11:05:07,990 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 41 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 11:05:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:27,226 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2022-01-31 11:05:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 11:05:27,226 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 66 [2022-01-31 11:05:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:27,230 INFO L225 Difference]: With dead ends: 170 [2022-01-31 11:05:27,231 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 11:05:27,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2688 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=856, Invalid=6788, Unknown=12, NotChecked=0, Total=7656 [2022-01-31 11:05:27,235 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 124 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:27,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 251 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 521 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2022-01-31 11:05:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 11:05:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2022-01-31 11:05:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 88 states have internal predecessors, (100), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 11:05:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2022-01-31 11:05:27,247 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 66 [2022-01-31 11:05:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:27,248 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2022-01-31 11:05:27,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 11:05:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2022-01-31 11:05:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 11:05:27,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:27,249 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2022-01-31 11:05:27,281 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 11:05:27,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:27,470 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash -568015196, now seen corresponding path program 1 times [2022-01-31 11:05:27,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:27,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357260182] [2022-01-31 11:05:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:27,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:05:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:27,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:05:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:27,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 11:05:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:27,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 11:05:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:27,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 11:05:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:05:27,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:27,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357260182] [2022-01-31 11:05:27,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357260182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:05:27,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477778581] [2022-01-31 11:05:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:27,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:27,810 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 11:05:27,811 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 11:05:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:27,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 11:05:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:27,959 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 13 treesize of output 9 [2022-01-31 11:05:28,262 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 19 treesize of output 7 [2022-01-31 11:05:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 11:05:28,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:36,505 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 16 treesize of output 14 [2022-01-31 11:05:36,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 treesize of output 24 [2022-01-31 11:05:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 11:05:36,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477778581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:36,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:05:36,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 14] total 38 [2022-01-31 11:05:36,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370637821] [2022-01-31 11:05:36,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 11:05:36,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 11:05:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1247, Unknown=4, NotChecked=0, Total=1406 [2022-01-31 11:05:36,580 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 38 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 35 states have internal predecessors, (94), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 11:05:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:39,545 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2022-01-31 11:05:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 11:05:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 35 states have internal predecessors, (94), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 66 [2022-01-31 11:05:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:39,547 INFO L225 Difference]: With dead ends: 161 [2022-01-31 11:05:39,547 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 11:05:39,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=416, Invalid=3361, Unknown=5, NotChecked=0, Total=3782 [2022-01-31 11:05:39,549 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 171 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:39,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 361 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1439 Invalid, 0 Unknown, 126 Unchecked, 0.5s Time] [2022-01-31 11:05:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 11:05:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2022-01-31 11:05:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 11:05:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2022-01-31 11:05:39,571 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 66 [2022-01-31 11:05:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:39,571 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2022-01-31 11:05:39,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 35 states have internal predecessors, (94), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 11:05:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2022-01-31 11:05:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 11:05:39,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:39,572 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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] [2022-01-31 11:05:39,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 11:05:39,773 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,SelfDestructingSolverStorable9 [2022-01-31 11:05:39,773 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1607078926, now seen corresponding path program 2 times [2022-01-31 11:05:39,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803169759] [2022-01-31 11:05:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:39,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:05:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:39,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:05:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:39,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 11:05:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:39,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 11:05:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:39,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 11:05:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 11:05:39,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:39,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803169759] [2022-01-31 11:05:39,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803169759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:05:39,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074549469] [2022-01-31 11:05:39,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:05:39,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:39,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:39,897 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 11:05:39,927 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 11:05:39,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:05:39,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:05:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 11:05:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 11:05:40,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:05:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 11:05:40,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074549469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:05:40,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:05:40,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 11:05:40,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129727955] [2022-01-31 11:05:40,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:05:40,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 11:05:40,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:05:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 11:05:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 11:05:40,238 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 11:05:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:05:40,450 INFO L93 Difference]: Finished difference Result 211 states and 232 transitions. [2022-01-31 11:05:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 11:05:40,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-01-31 11:05:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:05:40,451 INFO L225 Difference]: With dead ends: 211 [2022-01-31 11:05:40,452 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 11:05:40,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 11:05:40,452 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:05:40,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 97 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:05:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 11:05:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 88. [2022-01-31 11:05:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 73 states have internal predecessors, (82), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 11:05:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-01-31 11:05:40,456 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 69 [2022-01-31 11:05:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:05:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-01-31 11:05:40,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 11:05:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-01-31 11:05:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 11:05:40,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:05:40,457 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:05:40,476 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 11:05:40,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:40,672 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:05:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:05:40,672 INFO L85 PathProgramCache]: Analyzing trace with hash 700236181, now seen corresponding path program 7 times [2022-01-31 11:05:40,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:05:40,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353698263] [2022-01-31 11:05:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:05:40,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:05:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:05:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:05:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:41,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 11:05:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:41,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 11:05:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:41,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 11:05:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:05:41,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:05:41,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353698263] [2022-01-31 11:05:41,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353698263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:05:41,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977466313] [2022-01-31 11:05:41,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 11:05:41,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:05:41,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:05:41,221 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 11:05:41,245 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 11:05:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:05:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 11:05:41,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:05:41,445 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:05:41,530 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 11:05:41,530 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 25 treesize of output 24 [2022-01-31 11:05:48,010 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 19 treesize of output 7 [2022-01-31 11:05:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 11:05:48,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:06:14,081 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 46 treesize of output 40 [2022-01-31 11:06:14,088 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 11:06:14,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 198 [2022-01-31 11:06:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 50 refuted. 3 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 11:06:14,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977466313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:06:14,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:06:14,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 17, 17] total 50 [2022-01-31 11:06:14,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114953644] [2022-01-31 11:06:14,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:06:14,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 11:06:14,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:06:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 11:06:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2199, Unknown=20, NotChecked=0, Total=2450 [2022-01-31 11:06:14,237 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 50 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 11:06:22,291 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_main_#t~mem12| c_~N~0) (forall ((v_main_~i~0_139 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_139)) (forall ((v_ArrVal_293 Int)) (<= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ (* 4 v_main_~i~0_139) c_main_~a~0.offset) v_ArrVal_293) (+ c_main_~a~0.offset 12)) c_~N~0)))) (<= (select (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset)) c_~N~0) (= 2 (+ (- 1) c_main_~i~0))) is different from false [2022-01-31 11:06:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:06:22,487 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2022-01-31 11:06:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 11:06:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 71 [2022-01-31 11:06:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:06:22,488 INFO L225 Difference]: With dead ends: 156 [2022-01-31 11:06:22,488 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 11:06:22,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 122 SyntacticMatches, 13 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=757, Invalid=7055, Unknown=24, NotChecked=174, Total=8010 [2022-01-31 11:06:22,490 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 138 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 11:06:22,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 400 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1786 Invalid, 0 Unknown, 438 Unchecked, 0.8s Time] [2022-01-31 11:06:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 11:06:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 82. [2022-01-31 11:06:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.121212121212121) internal successors, (74), 67 states have internal predecessors, (74), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 11:06:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2022-01-31 11:06:22,493 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 71 [2022-01-31 11:06:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:06:22,494 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2022-01-31 11:06:22,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 11:06:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2022-01-31 11:06:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 11:06:22,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:06:22,495 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:06:22,512 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 11:06:22,700 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,SelfDestructingSolverStorable11 [2022-01-31 11:06:22,700 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:06:22,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:06:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1419946441, now seen corresponding path program 8 times [2022-01-31 11:06:22,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:06:22,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451338552] [2022-01-31 11:06:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:06:22,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:06:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:06:23,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:06:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:06:23,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:06:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:06:23,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 11:06:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:06:23,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 11:06:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:06:23,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 11:06:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:06:23,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 11:06:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:06:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 92 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 11:06:23,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:06:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451338552] [2022-01-31 11:06:23,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451338552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:06:23,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102892132] [2022-01-31 11:06:23,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:06:23,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:06:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:06:23,093 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 11:06:23,094 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 11:06:23,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:06:23,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:06:23,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 11:06:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:06:23,266 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:06:51,158 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 21 treesize of output 9 [2022-01-31 11:06:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 11:06:51,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:06:53,501 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 39 treesize of output 33 [2022-01-31 11:06:53,504 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 11:06:53,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2022-01-31 11:06:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 11:06:53,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102892132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:06:53,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:06:53,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18, 17] total 43 [2022-01-31 11:06:53,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101998534] [2022-01-31 11:06:53,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:06:53,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 11:06:53,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:06:53,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 11:06:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1637, Unknown=5, NotChecked=0, Total=1806 [2022-01-31 11:06:53,572 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 43 states, 41 states have (on average 2.731707317073171) internal successors, (112), 40 states have internal predecessors, (112), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 11:07:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:03,893 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2022-01-31 11:07:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 11:07:03,894 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.731707317073171) internal successors, (112), 40 states have internal predecessors, (112), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 79 [2022-01-31 11:07:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:03,894 INFO L225 Difference]: With dead ends: 141 [2022-01-31 11:07:03,894 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 11:07:03,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 148 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=528, Invalid=5011, Unknown=11, NotChecked=0, Total=5550 [2022-01-31 11:07:03,896 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 185 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 11:07:03,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 408 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1894 Invalid, 0 Unknown, 311 Unchecked, 0.7s Time] [2022-01-31 11:07:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 11:07:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 90. [2022-01-31 11:07:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 73 states have internal predecessors, (80), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 11:07:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-01-31 11:07:03,899 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 79 [2022-01-31 11:07:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:03,899 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-01-31 11:07:03,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.731707317073171) internal successors, (112), 40 states have internal predecessors, (112), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 11:07:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-01-31 11:07:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 11:07:03,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:03,900 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 11:07:03,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 11:07:04,100 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,SelfDestructingSolverStorable12 [2022-01-31 11:07:04,101 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:04,101 INFO L85 PathProgramCache]: Analyzing trace with hash -318300675, now seen corresponding path program 9 times [2022-01-31 11:07:04,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:04,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644804329] [2022-01-31 11:07:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:04,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:04,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:07:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:04,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:07:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:04,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 11:07:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:04,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 11:07:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:04,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 11:07:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 11:07:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 11:07:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 11:07:04,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:04,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644804329] [2022-01-31 11:07:04,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644804329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:07:04,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912315732] [2022-01-31 11:07:04,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:07:04,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:04,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:04,276 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 11:07:04,280 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 11:07:04,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 11:07:04,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:07:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 11:07:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 11:07:04,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:07:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 11:07:04,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912315732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:07:04,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:07:04,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 11:07:04,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145039850] [2022-01-31 11:07:04,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:07:04,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 11:07:04,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:04,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 11:07:04,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 11:07:04,798 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-01-31 11:07:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:07:05,053 INFO L93 Difference]: Finished difference Result 164 states and 180 transitions. [2022-01-31 11:07:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 11:07:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 87 [2022-01-31 11:07:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:07:05,054 INFO L225 Difference]: With dead ends: 164 [2022-01-31 11:07:05,054 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 11:07:05,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 179 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 11:07:05,055 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 215 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:07:05,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 94 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:07:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 11:07:05,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2022-01-31 11:07:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 78 states have internal predecessors, (86), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 11:07:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-01-31 11:07:05,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 87 [2022-01-31 11:07:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:07:05,057 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-01-31 11:07:05,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-01-31 11:07:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-01-31 11:07:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 11:07:05,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:07:05,058 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:07:05,078 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 11:07:05,264 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,SelfDestructingSolverStorable13 [2022-01-31 11:07:05,264 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:07:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:07:05,265 INFO L85 PathProgramCache]: Analyzing trace with hash -647028477, now seen corresponding path program 10 times [2022-01-31 11:07:05,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:07:05,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956160343] [2022-01-31 11:07:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:07:05,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:07:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:05,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:07:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:07:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:05,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 11:07:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:05,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 11:07:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 11:07:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:05,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 11:07:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:05,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 11:07:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:07:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 10 proven. 137 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 11:07:05,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:07:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956160343] [2022-01-31 11:07:05,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956160343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:07:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443441314] [2022-01-31 11:07:05,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:07:05,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:07:05,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:07:05,735 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 11:07:05,735 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 11:07:05,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:07:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:07:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 11:07:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:07:05,909 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:07:53,664 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 21 treesize of output 9 [2022-01-31 11:07:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-31 11:07:53,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:07:56,107 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 39 treesize of output 33 [2022-01-31 11:07:56,110 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 11:07:56,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2022-01-31 11:07:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 10 proven. 101 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-31 11:07:56,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443441314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:07:56,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:07:56,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 19] total 48 [2022-01-31 11:07:56,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303512957] [2022-01-31 11:07:56,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:07:56,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 11:07:56,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:07:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 11:07:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2060, Unknown=6, NotChecked=0, Total=2256 [2022-01-31 11:07:56,170 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 48 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 45 states have internal predecessors, (129), 17 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 11:08:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:08:10,312 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2022-01-31 11:08:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 11:08:10,312 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 45 states have internal predecessors, (129), 17 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 92 [2022-01-31 11:08:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:08:10,313 INFO L225 Difference]: With dead ends: 167 [2022-01-31 11:08:10,313 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 11:08:10,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 168 SyntacticMatches, 14 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=609, Invalid=6351, Unknown=12, NotChecked=0, Total=6972 [2022-01-31 11:08:10,314 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 182 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:08:10,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 582 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2827 Invalid, 0 Unknown, 266 Unchecked, 1.1s Time] [2022-01-31 11:08:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 11:08:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 103. [2022-01-31 11:08:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 83 states have (on average 1.108433734939759) internal successors, (92), 84 states have internal predecessors, (92), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 11:08:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-01-31 11:08:10,317 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 92 [2022-01-31 11:08:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:08:10,318 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-01-31 11:08:10,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 45 states have internal predecessors, (129), 17 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 11:08:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-01-31 11:08:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 11:08:10,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:08:10,318 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2022-01-31 11:08:10,347 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 11:08:10,519 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,SelfDestructingSolverStorable14 [2022-01-31 11:08:10,519 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:08:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:08:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1290648375, now seen corresponding path program 11 times [2022-01-31 11:08:10,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:08:10,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564807127] [2022-01-31 11:08:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:08:10,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:08:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:08:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:08:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 11:08:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 11:08:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 11:08:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 11:08:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 11:08:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 11:08:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-01-31 11:08:10,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:08:10,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564807127] [2022-01-31 11:08:10,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564807127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:08:10,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343185123] [2022-01-31 11:08:10,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:08:10,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:08:10,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:08:10,666 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 11:08:10,667 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 11:08:10,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 11:08:10,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:08:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 11:08:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:08:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-01-31 11:08:11,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:08:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-01-31 11:08:11,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343185123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:08:11,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:08:11,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 11:08:11,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218647041] [2022-01-31 11:08:11,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:08:11,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 11:08:11,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:08:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 11:08:11,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 11:08:11,257 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 26 states have internal predecessors, (104), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 11:08:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:08:11,539 INFO L93 Difference]: Finished difference Result 188 states and 206 transitions. [2022-01-31 11:08:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 11:08:11,540 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 26 states have internal predecessors, (104), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 100 [2022-01-31 11:08:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:08:11,540 INFO L225 Difference]: With dead ends: 188 [2022-01-31 11:08:11,541 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 11:08:11,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 207 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 11:08:11,541 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 174 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:08:11,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 143 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:08:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 11:08:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2022-01-31 11:08:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 89 states have internal predecessors, (98), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 11:08:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2022-01-31 11:08:11,544 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 100 [2022-01-31 11:08:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:08:11,544 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2022-01-31 11:08:11,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 26 states have internal predecessors, (104), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 11:08:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2022-01-31 11:08:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 11:08:11,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:08:11,545 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:08:11,562 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 11:08:11,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:08:11,761 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:08:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:08:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash 281010233, now seen corresponding path program 12 times [2022-01-31 11:08:11,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:08:11,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69602252] [2022-01-31 11:08:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:08:11,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:08:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:08:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:08:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 11:08:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 11:08:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 11:08:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 11:08:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 11:08:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 11:08:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 12 proven. 191 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 11:08:12,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:08:12,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69602252] [2022-01-31 11:08:12,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69602252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:08:12,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562382679] [2022-01-31 11:08:12,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 11:08:12,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:08:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:08:12,308 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 11:08:12,328 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 11:08:12,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 11:08:12,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:08:12,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 11:08:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:08:12,851 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:08:14,322 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 11:08:14,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-31 11:08:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 66 proven. 88 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-31 11:08:14,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:08:14,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562382679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:08:14,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:08:14,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24] total 55 [2022-01-31 11:08:14,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167489008] [2022-01-31 11:08:14,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:08:14,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 11:08:14,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:08:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 11:08:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 11:08:14,595 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand has 55 states, 53 states have (on average 2.358490566037736) internal successors, (125), 52 states have internal predecessors, (125), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 11:08:16,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:08:16,366 INFO L93 Difference]: Finished difference Result 183 states and 194 transitions. [2022-01-31 11:08:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 11:08:16,366 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.358490566037736) internal successors, (125), 52 states have internal predecessors, (125), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 105 [2022-01-31 11:08:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:08:16,367 INFO L225 Difference]: With dead ends: 183 [2022-01-31 11:08:16,367 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 11:08:16,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 109 SyntacticMatches, 12 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1086, Invalid=9834, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 11:08:16,369 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 46 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:08:16,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 508 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 736 Invalid, 0 Unknown, 214 Unchecked, 0.3s Time] [2022-01-31 11:08:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 11:08:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2022-01-31 11:08:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.120879120879121) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 11:08:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-01-31 11:08:16,372 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 105 [2022-01-31 11:08:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:08:16,372 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-01-31 11:08:16,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.358490566037736) internal successors, (125), 52 states have internal predecessors, (125), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 11:08:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-01-31 11:08:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 11:08:16,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:08:16,373 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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] [2022-01-31 11:08:16,390 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 11:08:16,573 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,SelfDestructingSolverStorable16 [2022-01-31 11:08:16,573 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:08:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:08:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash 911468858, now seen corresponding path program 3 times [2022-01-31 11:08:16,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:08:16,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528454050] [2022-01-31 11:08:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:08:16,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:08:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:08:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:08:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 11:08:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 11:08:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 11:08:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 11:08:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 11:08:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 11:08:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:08:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 12 proven. 191 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 11:08:17,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:08:17,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528454050] [2022-01-31 11:08:17,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528454050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:08:17,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728021627] [2022-01-31 11:08:17,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:08:17,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:08:17,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:08:17,125 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 11:08:17,126 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 11:08:17,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 11:08:17,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:08:17,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 11:08:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:08:17,809 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 11:08:43,431 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 11:08:43,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-31 11:08:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 85 proven. 67 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-01-31 11:08:43,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:08:43,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728021627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:08:43,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:08:43,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26] total 56 [2022-01-31 11:08:43,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671651540] [2022-01-31 11:08:43,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:08:43,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 11:08:43,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:08:43,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 11:08:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2996, Unknown=2, NotChecked=0, Total=3306 [2022-01-31 11:08:43,659 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 56 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 11:09:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:09:16,290 INFO L93 Difference]: Finished difference Result 274 states and 305 transitions. [2022-01-31 11:09:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 11:09:16,290 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 105 [2022-01-31 11:09:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:09:16,291 INFO L225 Difference]: With dead ends: 274 [2022-01-31 11:09:16,291 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 11:09:16,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 12 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4170 ImplicationChecksByTransitivity, 57.6s TimeCoverageRelationStatistics Valid=1501, Invalid=13488, Unknown=17, NotChecked=0, Total=15006 [2022-01-31 11:09:16,293 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 334 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 814 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 11:09:16,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 469 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1788 Invalid, 0 Unknown, 814 Unchecked, 0.7s Time] [2022-01-31 11:09:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 11:09:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 176. [2022-01-31 11:09:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 149 states have internal predecessors, (169), 16 states have call successors, (16), 13 states have call predecessors, (16), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 11:09:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 200 transitions. [2022-01-31 11:09:16,296 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 200 transitions. Word has length 105 [2022-01-31 11:09:16,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:09:16,297 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 200 transitions. [2022-01-31 11:09:16,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 11:09:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 200 transitions. [2022-01-31 11:09:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 11:09:16,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:09:16,297 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:09:16,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 11:09:16,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 11:09:16,498 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:09:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:09:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1658102957, now seen corresponding path program 13 times [2022-01-31 11:09:16,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:09:16,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310760099] [2022-01-31 11:09:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:09:16,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:09:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:09:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:09:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 11:09:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 11:09:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 11:09:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 11:09:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 11:09:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 11:09:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 85 proven. 68 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 11:09:16,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:09:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310760099] [2022-01-31 11:09:16,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310760099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:09:16,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346985322] [2022-01-31 11:09:16,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 11:09:16,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:09:16,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:09:16,667 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 11:09:16,668 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 11:09:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:16,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 11:09:16,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:09:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 11:09:17,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:09:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 104 proven. 49 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 11:09:17,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346985322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:09:17,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:09:17,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 11:09:17,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077611636] [2022-01-31 11:09:17,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:09:17,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 11:09:17,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:09:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 11:09:17,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 11:09:17,230 INFO L87 Difference]: Start difference. First operand 176 states and 200 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 11:09:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:09:17,616 INFO L93 Difference]: Finished difference Result 209 states and 229 transitions. [2022-01-31 11:09:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 11:09:17,617 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 108 [2022-01-31 11:09:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:09:17,617 INFO L225 Difference]: With dead ends: 209 [2022-01-31 11:09:17,618 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 11:09:17,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 222 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 11:09:17,618 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 301 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:09:17,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 111 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 11:09:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 11:09:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 113. [2022-01-31 11:09:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.118279569892473) internal successors, (104), 94 states have internal predecessors, (104), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 11:09:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2022-01-31 11:09:17,621 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 108 [2022-01-31 11:09:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:09:17,621 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2022-01-31 11:09:17,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 11:09:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2022-01-31 11:09:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 11:09:17,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:09:17,622 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:09:17,639 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 11:09:17,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:09:17,832 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:09:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:09:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash -324404945, now seen corresponding path program 14 times [2022-01-31 11:09:17,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:09:17,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910752443] [2022-01-31 11:09:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:09:17,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:09:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:09:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:09:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 11:09:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 11:09:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 11:09:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 11:09:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 11:09:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 11:09:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:09:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 228 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 11:09:18,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:09:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910752443] [2022-01-31 11:09:18,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910752443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:09:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523725551] [2022-01-31 11:09:18,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:09:18,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:09:18,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:09:18,522 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 11:09:18,537 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 11:09:18,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:09:18,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:09:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 11:09:18,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:09:18,756 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:09:18,847 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 11:09:18,848 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 27 treesize of output 26 [2022-01-31 11:10:25,845 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 23 treesize of output 7 [2022-01-31 11:10:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 11:10:25,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:11:56,100 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 46 treesize of output 40 [2022-01-31 11:11:56,107 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 11:11:56,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 90 [2022-01-31 11:11:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 158 refuted. 6 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 11:11:56,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523725551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:11:56,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:11:56,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23, 23] total 59 [2022-01-31 11:11:56,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034172781] [2022-01-31 11:11:56,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:11:56,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 11:11:56,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:11:56,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 11:11:56,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3086, Unknown=59, NotChecked=0, Total=3422 [2022-01-31 11:11:56,242 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 59 states, 57 states have (on average 2.754385964912281) internal successors, (157), 56 states have internal predecessors, (157), 20 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 11:12:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:12:26,915 INFO L93 Difference]: Finished difference Result 238 states and 262 transitions. [2022-01-31 11:12:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 11:12:26,915 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 2.754385964912281) internal successors, (157), 56 states have internal predecessors, (157), 20 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 110 [2022-01-31 11:12:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:12:26,916 INFO L225 Difference]: With dead ends: 238 [2022-01-31 11:12:26,916 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 11:12:26,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 206 SyntacticMatches, 18 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 186.8s TimeCoverageRelationStatistics Valid=690, Invalid=9337, Unknown=73, NotChecked=0, Total=10100 [2022-01-31 11:12:26,918 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 210 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 3514 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 4091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:12:26,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 652 Invalid, 4091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3514 Invalid, 0 Unknown, 400 Unchecked, 1.3s Time] [2022-01-31 11:12:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 11:12:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 199. [2022-01-31 11:12:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 159 states have (on average 1.0943396226415094) internal successors, (174), 162 states have internal predecessors, (174), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 11:12:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 219 transitions. [2022-01-31 11:12:26,922 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 219 transitions. Word has length 110 [2022-01-31 11:12:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:12:26,922 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 219 transitions. [2022-01-31 11:12:26,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 2.754385964912281) internal successors, (157), 56 states have internal predecessors, (157), 20 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 11:12:26,923 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 219 transitions. [2022-01-31 11:12:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 11:12:26,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:12:26,923 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 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] [2022-01-31 11:12:26,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 11:12:27,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:12:27,124 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:12:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:12:27,124 INFO L85 PathProgramCache]: Analyzing trace with hash 306053680, now seen corresponding path program 4 times [2022-01-31 11:12:27,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:12:27,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45706368] [2022-01-31 11:12:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:12:27,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:12:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:12:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:12:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 11:12:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 11:12:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 11:12:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 11:12:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 11:12:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 11:12:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:12:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 228 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 11:12:27,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:12:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45706368] [2022-01-31 11:12:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45706368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:12:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098252005] [2022-01-31 11:12:27,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:12:27,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:12:27,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:12:27,812 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 11:12:27,837 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 11:12:27,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:12:27,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:12:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 11:12:27,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:12:28,044 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:12:28,133 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 11:12:28,133 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 27 treesize of output 26 [2022-01-31 11:13:34,271 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 23 treesize of output 7 [2022-01-31 11:13:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 11:13:34,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:14:55,761 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 46 treesize of output 40 [2022-01-31 11:14:55,765 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 11:14:55,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 90 [2022-01-31 11:14:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 158 refuted. 6 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 11:14:55,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098252005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:14:55,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:14:55,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23, 23] total 59 [2022-01-31 11:14:55,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312696739] [2022-01-31 11:14:55,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:14:55,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 11:14:55,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:14:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 11:14:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3086, Unknown=59, NotChecked=0, Total=3422 [2022-01-31 11:14:55,883 INFO L87 Difference]: Start difference. First operand 199 states and 219 transitions. Second operand has 59 states, 57 states have (on average 2.754385964912281) internal successors, (157), 56 states have internal predecessors, (157), 20 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 11:15:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:15:20,393 INFO L93 Difference]: Finished difference Result 341 states and 364 transitions. [2022-01-31 11:15:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 11:15:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 2.754385964912281) internal successors, (157), 56 states have internal predecessors, (157), 20 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 110 [2022-01-31 11:15:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:15:20,395 INFO L225 Difference]: With dead ends: 341 [2022-01-31 11:15:20,395 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 11:15:20,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 212 SyntacticMatches, 20 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2456 ImplicationChecksByTransitivity, 171.0s TimeCoverageRelationStatistics Valid=643, Invalid=7843, Unknown=70, NotChecked=0, Total=8556 [2022-01-31 11:15:20,396 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 210 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 3502 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 4123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 11:15:20,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 933 Invalid, 4123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3502 Invalid, 0 Unknown, 497 Unchecked, 1.4s Time] [2022-01-31 11:15:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 11:15:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 203. [2022-01-31 11:15:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 163 states have (on average 1.1042944785276074) internal successors, (180), 166 states have internal predecessors, (180), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 11:15:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 225 transitions. [2022-01-31 11:15:20,401 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 225 transitions. Word has length 110 [2022-01-31 11:15:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:15:20,402 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 225 transitions. [2022-01-31 11:15:20,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 2.754385964912281) internal successors, (157), 56 states have internal predecessors, (157), 20 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 11:15:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 225 transitions. [2022-01-31 11:15:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 11:15:20,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:15:20,403 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:15:20,421 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 11:15:20,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:15:20,603 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:15:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:15:20,604 INFO L85 PathProgramCache]: Analyzing trace with hash 406965647, now seen corresponding path program 5 times [2022-01-31 11:15:20,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:15:20,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173994908] [2022-01-31 11:15:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:15:20,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:15:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:15:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:15:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 11:15:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 11:15:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 11:15:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 11:15:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 11:15:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 11:15:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:15:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 228 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 11:15:21,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:15:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173994908] [2022-01-31 11:15:21,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173994908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:15:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067293446] [2022-01-31 11:15:21,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:15:21,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:15:21,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:15:21,299 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 11:15:21,302 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 11:15:21,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-31 11:15:21,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:15:21,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 11:15:21,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:15:21,686 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 11:15:21,777 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 11:15:21,777 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 27 treesize of output 26 [2022-01-31 11:16:35,233 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 23 treesize of output 7 [2022-01-31 11:16:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 11:16:35,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:17:13,574 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 23 treesize of output 21 [2022-01-31 11:17:13,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 178 treesize of output 170 [2022-01-31 11:17:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 164 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 11:17:13,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067293446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:17:13,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:17:13,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 22, 22] total 48 [2022-01-31 11:17:13,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593618577] [2022-01-31 11:17:13,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:17:13,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 11:17:13,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:17:13,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 11:17:13,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2003, Unknown=25, NotChecked=0, Total=2256 [2022-01-31 11:17:13,695 INFO L87 Difference]: Start difference. First operand 203 states and 225 transitions. Second operand has 48 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 45 states have internal predecessors, (138), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 11:17:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:17:29,008 INFO L93 Difference]: Finished difference Result 316 states and 348 transitions. [2022-01-31 11:17:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 11:17:29,009 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 45 states have internal predecessors, (138), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 110 [2022-01-31 11:17:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:17:29,010 INFO L225 Difference]: With dead ends: 316 [2022-01-31 11:17:29,010 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 11:17:29,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 213 SyntacticMatches, 17 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 126.2s TimeCoverageRelationStatistics Valid=624, Invalid=6484, Unknown=32, NotChecked=0, Total=7140 [2022-01-31 11:17:29,011 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 216 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 3174 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:17:29,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 700 Invalid, 3593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3174 Invalid, 0 Unknown, 254 Unchecked, 1.2s Time] [2022-01-31 11:17:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 11:17:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 206. [2022-01-31 11:17:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 166 states have (on average 1.1144578313253013) internal successors, (185), 169 states have internal predecessors, (185), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 11:17:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 230 transitions. [2022-01-31 11:17:29,016 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 230 transitions. Word has length 110 [2022-01-31 11:17:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:17:29,017 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 230 transitions. [2022-01-31 11:17:29,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 45 states have internal predecessors, (138), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 11:17:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 230 transitions. [2022-01-31 11:17:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 11:17:29,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:17:29,018 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:17:29,035 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 11:17:29,232 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,SelfDestructingSolverStorable21 [2022-01-31 11:17:29,232 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:17:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:17:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1280972445, now seen corresponding path program 15 times [2022-01-31 11:17:29,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:17:29,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37850966] [2022-01-31 11:17:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:17:29,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:17:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:17:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:17:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 11:17:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 11:17:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 11:17:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 11:17:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 11:17:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-31 11:17:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:17:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 107 proven. 86 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 11:17:29,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:17:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37850966] [2022-01-31 11:17:29,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37850966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:17:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306405546] [2022-01-31 11:17:29,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:17:29,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:17:29,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:17:29,418 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 11:17:29,419 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 11:17:29,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 11:17:29,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:17:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 11:17:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:17:29,871 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-31 11:17:29,970 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 11:17:29,971 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 28 treesize of output 27 [2022-01-31 11:18:31,572 INFO L353 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2022-01-31 11:18:31,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-31 11:18:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 44 proven. 151 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-01-31 11:18:31,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:18:32,244 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 48 treesize of output 42 [2022-01-31 11:18:32,249 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 11:18:32,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 89 [2022-01-31 11:18:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 12 proven. 183 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-01-31 11:18:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306405546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:18:32,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:18:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30, 30] total 66 [2022-01-31 11:18:32,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662953389] [2022-01-31 11:18:32,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:18:32,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 11:18:32,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:18:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 11:18:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=3781, Unknown=5, NotChecked=0, Total=4290 [2022-01-31 11:18:32,515 INFO L87 Difference]: Start difference. First operand 206 states and 230 transitions. Second operand has 66 states, 64 states have (on average 2.296875) internal successors, (147), 64 states have internal predecessors, (147), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15)