/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/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:48:26,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:48:26,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:48:26,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 20:48:26,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 20:48:26,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 20:48:26,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 20:48:26,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 20:48:26,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 20:48:26,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 20:48:26,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 20:48:26,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 20:48:26,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:48:26,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:48:26,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:48:26,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:48:26,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:48:26,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:48:26,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:48:26,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:48:26,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:48:26,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:48:26,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:48:26,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:48:26,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:48:26,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:48:26,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:48:26,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:48:26,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:48:26,689 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:48:26,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:48:26,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:48:26,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:48:26,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:48:26,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:48:26,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:48:26,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:48:26,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:48:26,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:48:26,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:48:26,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:48:26,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:48:26,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:48:26,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:48:26,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:48:26,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:48:26,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:48:26,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:48:26,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:48:26,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:48:26,695 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:48:26,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:48:26,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:48:26,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:48:26,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:48:26,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:48:26,909 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:48:26,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-02-14 20:48:26,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74740ee95/c27d52960c894ccead7edb5cff3ecda3/FLAG4ea859997 [2022-02-14 20:48:27,303 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:48:27,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-02-14 20:48:27,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74740ee95/c27d52960c894ccead7edb5cff3ecda3/FLAG4ea859997 [2022-02-14 20:48:27,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74740ee95/c27d52960c894ccead7edb5cff3ecda3 [2022-02-14 20:48:27,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:48:27,321 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:48:27,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:48:27,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:48:27,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:48:27,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4048d83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27, skipping insertion in model container [2022-02-14 20:48:27,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:48:27,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:48:27,487 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-02-14 20:48:27,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:48:27,503 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:48:27,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-02-14 20:48:27,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:48:27,527 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:48:27,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27 WrapperNode [2022-02-14 20:48:27,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:48:27,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:48:27,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:48:27,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:48:27,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:48:27,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:48:27,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:48:27,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:48:27,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:48:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:48:27,580 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) [2022-02-14 20:48:27,599 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 [2022-02-14 20:48:27,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:48:27,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:48:27,622 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:48:27,623 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 20:48:27,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:48:27,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:48:27,623 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:48:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:48:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 20:48:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 20:48:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:48:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:48:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 20:48:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:48:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 20:48:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:48:27,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-14 20:48:27,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:48:27,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:48:27,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:48:27,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:48:27,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:48:27,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:48:27,701 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:48:27,703 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:48:27,794 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:48:27,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:48:27,799 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 20:48:27,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:48:27 BoogieIcfgContainer [2022-02-14 20:48:27,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:48:27,802 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:48:27,802 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:48:27,803 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:48:27,805 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:48:27" (1/1) ... [2022-02-14 20:48:27,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:48:27 BasicIcfg [2022-02-14 20:48:27,820 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:48:27,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:48:27,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:48:27,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:48:27,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:48:27" (1/4) ... [2022-02-14 20:48:27,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ad876d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:48:27, skipping insertion in model container [2022-02-14 20:48:27,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:48:27" (2/4) ... [2022-02-14 20:48:27,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ad876d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:48:27, skipping insertion in model container [2022-02-14 20:48:27,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:48:27" (3/4) ... [2022-02-14 20:48:27,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ad876d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:48:27, skipping insertion in model container [2022-02-14 20:48:27,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:48:27" (4/4) ... [2022-02-14 20:48:27,826 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.iJordan [2022-02-14 20:48:27,830 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:48:27,830 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:48:27,896 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:48:27,902 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 [2022-02-14 20:48:27,903 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:48:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-02-14 20:48:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 20:48:27,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:48:27,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:48:27,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:48:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:48:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash -183287108, now seen corresponding path program 1 times [2022-02-14 20:48:27,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:48:27,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245131623] [2022-02-14 20:48:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:48:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:48:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:28,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:48:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:48:28,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:48:28,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245131623] [2022-02-14 20:48:28,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245131623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:48:28,213 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:48:28,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:48:28,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064990516] [2022-02-14 20:48:28,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:48:28,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:48:28,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:48:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:48:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:48:28,251 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:48:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:48:28,355 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-02-14 20:48:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 20:48:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-14 20:48:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:48:28,374 INFO L225 Difference]: With dead ends: 38 [2022-02-14 20:48:28,374 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 20:48:28,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 20:48:28,380 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:48:28,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:48:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 20:48:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-02-14 20:48:28,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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) [2022-02-14 20:48:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-02-14 20:48:28,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-02-14 20:48:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:48:28,420 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-02-14 20:48:28,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:48:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-02-14 20:48:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 20:48:28,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:48:28,422 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] [2022-02-14 20:48:28,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:48:28,423 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:48:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:48:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash 364957256, now seen corresponding path program 1 times [2022-02-14 20:48:28,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:48:28,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528388610] [2022-02-14 20:48:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:48:28,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:48:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:28,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:48:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:48:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:48:28,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:48:28,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528388610] [2022-02-14 20:48:28,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528388610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:48:28,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849913948] [2022-02-14 20:48:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:48:28,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:48:28,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:48:28,532 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) [2022-02-14 20:48:28,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 20:48:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 20:48:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:48:28,717 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 [2022-02-14 20:48:28,865 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-14 20:48:28,866 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 37 treesize of output 22 [2022-02-14 20:48:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:48:29,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:48:29,273 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 45 treesize of output 41 [2022-02-14 20:48:29,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 20:48:29,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2022-02-14 20:48:29,310 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 12 treesize of output 4 [2022-02-14 20:48:29,328 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 13 treesize of output 4 [2022-02-14 20:48:29,364 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-02-14 20:48:29,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2022-02-14 20:48:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:48:29,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849913948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:48:29,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:48:29,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-02-14 20:48:29,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229948826] [2022-02-14 20:48:29,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:48:29,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 20:48:29,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:48:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 20:48:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-14 20:48:29,715 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 20:48:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:48:30,130 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-02-14 20:48:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 20:48:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-02-14 20:48:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:48:30,132 INFO L225 Difference]: With dead ends: 41 [2022-02-14 20:48:30,132 INFO L226 Difference]: Without dead ends: 41 [2022-02-14 20:48:30,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-02-14 20:48:30,134 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:48:30,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:48:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-14 20:48:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-02-14 20:48:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 20:48:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-02-14 20:48:30,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-02-14 20:48:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:48:30,139 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-02-14 20:48:30,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 20:48:30,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-02-14 20:48:30,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 20:48:30,141 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:48:30,141 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] [2022-02-14 20:48:30,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 20:48:30,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:48:30,342 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:48:30,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:48:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1998589396, now seen corresponding path program 2 times [2022-02-14 20:48:30,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:48:30,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422368530] [2022-02-14 20:48:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:48:30,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:48:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:30,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:48:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:30,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:48:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:30,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:48:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 20:48:30,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:48:30,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422368530] [2022-02-14 20:48:30,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422368530] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:48:30,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934809563] [2022-02-14 20:48:30,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:48:30,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:48:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:48:30,449 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) [2022-02-14 20:48:30,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:48:30,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:48:30,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:48:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 20:48:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:48:30,605 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 [2022-02-14 20:48:30,861 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-02-14 20:48:30,861 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 45 treesize of output 48 [2022-02-14 20:48:31,248 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-14 20:48:31,248 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 37 treesize of output 22 [2022-02-14 20:48:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 20:48:31,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:48:35,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934809563] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:48:35,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 20:48:35,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-02-14 20:48:35,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625784315] [2022-02-14 20:48:35,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 20:48:35,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-14 20:48:35,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:48:35,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-14 20:48:35,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-02-14 20:48:35,040 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 20:48:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:48:35,698 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-02-14 20:48:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-14 20:48:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-02-14 20:48:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:48:35,700 INFO L225 Difference]: With dead ends: 55 [2022-02-14 20:48:35,700 INFO L226 Difference]: Without dead ends: 55 [2022-02-14 20:48:35,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=296, Invalid=1682, Unknown=2, NotChecked=0, Total=1980 [2022-02-14 20:48:35,702 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:48:35,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 216 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-02-14 20:48:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-14 20:48:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-02-14 20:48:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 20:48:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-02-14 20:48:35,715 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-02-14 20:48:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:48:35,715 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-02-14 20:48:35,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 20:48:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-02-14 20:48:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 20:48:35,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:48:35,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:48:35,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 20:48:35,917 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,SelfDestructingSolverStorable2 [2022-02-14 20:48:35,917 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:48:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:48:35,918 INFO L85 PathProgramCache]: Analyzing trace with hash 483843889, now seen corresponding path program 1 times [2022-02-14 20:48:35,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:48:35,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422922968] [2022-02-14 20:48:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:48:35,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:48:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:36,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:48:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:48:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:36,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:48:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:36,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 20:48:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:36,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 20:48:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-14 20:48:36,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:48:36,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422922968] [2022-02-14 20:48:36,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422922968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:48:36,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191478676] [2022-02-14 20:48:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:48:36,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:48:36,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:48:36,100 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) [2022-02-14 20:48:36,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 20:48:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:36,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 20:48:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:48:36,263 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 58 treesize of output 53 [2022-02-14 20:48:36,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-02-14 20:48:36,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-02-14 20:48:36,308 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 55 treesize of output 28 [2022-02-14 20:48:38,366 INFO L353 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-02-14 20:48:38,366 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 56 treesize of output 57 [2022-02-14 20:48:39,419 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-02-14 20:48:39,420 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 48 treesize of output 21 [2022-02-14 20:48:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 20:48:39,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:48:43,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191478676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:48:43,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 20:48:43,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 21 [2022-02-14 20:48:43,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660060563] [2022-02-14 20:48:43,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 20:48:43,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-14 20:48:43,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:48:43,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-14 20:48:43,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=599, Unknown=2, NotChecked=0, Total=702 [2022-02-14 20:48:43,969 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-14 20:48:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:48:44,407 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-02-14 20:48:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-14 20:48:44,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-02-14 20:48:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:48:44,409 INFO L225 Difference]: With dead ends: 66 [2022-02-14 20:48:44,409 INFO L226 Difference]: Without dead ends: 66 [2022-02-14 20:48:44,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=205, Invalid=1353, Unknown=2, NotChecked=0, Total=1560 [2022-02-14 20:48:44,411 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:48:44,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 150 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 169 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-02-14 20:48:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-14 20:48:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-02-14 20:48:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 20:48:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-02-14 20:48:44,418 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-02-14 20:48:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:48:44,418 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-02-14 20:48:44,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-14 20:48:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-02-14 20:48:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-14 20:48:44,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:48:44,419 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:48:44,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 20:48:44,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:48:44,634 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:48:44,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:48:44,635 INFO L85 PathProgramCache]: Analyzing trace with hash -926913650, now seen corresponding path program 2 times [2022-02-14 20:48:44,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:48:44,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155580239] [2022-02-14 20:48:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:48:44,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:48:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:44,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:48:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:44,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:48:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:44,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:48:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:44,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 20:48:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:44,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 20:48:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:44,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 20:48:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:44,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 20:48:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:48:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 20:48:44,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:48:44,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155580239] [2022-02-14 20:48:44,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155580239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:48:44,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638266829] [2022-02-14 20:48:44,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:48:44,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:48:44,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:48:44,753 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) [2022-02-14 20:48:44,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 20:48:44,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:48:44,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:48:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 20:48:44,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:48:44,958 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 58 treesize of output 53 [2022-02-14 20:48:44,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-02-14 20:48:44,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-02-14 20:48:45,001 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 55 treesize of output 28 [2022-02-14 20:48:48,397 INFO L353 Elim1Store]: treesize reduction 113, result has 28.9 percent of original size [2022-02-14 20:48:48,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 94 [2022-02-14 20:49:00,497 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-02-14 20:49:00,497 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 48 treesize of output 21 [2022-02-14 20:49:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 4 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 20:49:00,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:49:09,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638266829] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:49:09,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 20:49:09,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 21] total 24 [2022-02-14 20:49:09,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495350044] [2022-02-14 20:49:09,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 20:49:09,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-14 20:49:09,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-14 20:49:09,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=794, Unknown=11, NotChecked=0, Total=930 [2022-02-14 20:49:09,989 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 24 states, 22 states have (on average 2.590909090909091) internal successors, (57), 20 states have internal predecessors, (57), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-14 20:49:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:13,499 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-02-14 20:49:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-14 20:49:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.590909090909091) internal successors, (57), 20 states have internal predecessors, (57), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-02-14 20:49:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:13,500 INFO L225 Difference]: With dead ends: 86 [2022-02-14 20:49:13,500 INFO L226 Difference]: Without dead ends: 86 [2022-02-14 20:49:13,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=252, Invalid=1805, Unknown=13, NotChecked=0, Total=2070 [2022-02-14 20:49:13,502 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:13,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 202 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 330 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-02-14 20:49:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-14 20:49:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-02-14 20:49:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 20:49:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-02-14 20:49:13,509 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-02-14 20:49:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:13,510 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-02-14 20:49:13,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.590909090909091) internal successors, (57), 20 states have internal predecessors, (57), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-14 20:49:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-02-14 20:49:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-14 20:49:13,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:13,511 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:13,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-14 20:49:13,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:49:13,727 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash -635325717, now seen corresponding path program 3 times [2022-02-14 20:49:13,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:13,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206687409] [2022-02-14 20:49:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:13,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:49:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:49:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 20:49:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 20:49:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 20:49:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 20:49:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 20:49:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 20:49:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-02-14 20:49:13,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:13,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206687409] [2022-02-14 20:49:13,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206687409] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:49:13,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178292840] [2022-02-14 20:49:13,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:49:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:49:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:49:13,882 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) [2022-02-14 20:49:13,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 20:49:14,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-14 20:49:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:49:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-14 20:49:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:49:14,515 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 58 treesize of output 53 [2022-02-14 20:49:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 20:49:14,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-02-14 20:49:14,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-02-14 20:49:14,549 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 57 treesize of output 30 [2022-02-14 20:49:14,798 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 104 treesize of output 95 [2022-02-14 20:49:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 20:49:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 20:49:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 20:49:14,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 104 [2022-02-14 20:49:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 20:49:14,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 47 [2022-02-14 20:49:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-02-14 20:49:14,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:49:17,769 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 45 treesize of output 41 [2022-02-14 20:49:17,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-14 20:49:17,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 20:49:17,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2022-02-14 20:49:17,786 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 13 treesize of output 4 [2022-02-14 20:49:17,805 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-02-14 20:49:17,806 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 22 treesize of output 10 [2022-02-14 20:49:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-14 20:49:18,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178292840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:49:18,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:49:18,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-02-14 20:49:18,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198227801] [2022-02-14 20:49:18,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:49:18,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-14 20:49:18,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-14 20:49:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-02-14 20:49:18,106 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-14 20:49:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:23,863 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2022-02-14 20:49:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-14 20:49:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-02-14 20:49:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:23,866 INFO L225 Difference]: With dead ends: 192 [2022-02-14 20:49:23,866 INFO L226 Difference]: Without dead ends: 192 [2022-02-14 20:49:23,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1059, Invalid=6081, Unknown=0, NotChecked=0, Total=7140 [2022-02-14 20:49:23,869 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 325 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:23,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 152 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1956 Invalid, 0 Unknown, 258 Unchecked, 2.3s Time] [2022-02-14 20:49:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-14 20:49:23,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-02-14 20:49:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.086021505376344) internal successors, (101), 95 states have internal predecessors, (101), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-14 20:49:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-02-14 20:49:23,898 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-02-14 20:49:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:23,898 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-02-14 20:49:23,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-14 20:49:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-02-14 20:49:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-14 20:49:23,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:23,900 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:23,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 20:49:24,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:49:24,103 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 994030920, now seen corresponding path program 4 times [2022-02-14 20:49:24,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:24,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559883426] [2022-02-14 20:49:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:49:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:49:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 20:49:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 20:49:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 20:49:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 20:49:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 20:49:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 20:49:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 20:49:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 20:49:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-14 20:49:24,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:24,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559883426] [2022-02-14 20:49:24,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559883426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:49:24,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568462214] [2022-02-14 20:49:24,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 20:49:24,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:49:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:49:24,252 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) [2022-02-14 20:49:24,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 20:49:24,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 20:49:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:49:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 20:49:24,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:49:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-14 20:49:25,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:49:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-14 20:49:25,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568462214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:49:25,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:49:25,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-14 20:49:25,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704185443] [2022-02-14 20:49:25,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:49:25,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 20:49:25,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 20:49:25,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-14 20:49:25,271 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-14 20:49:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:26,595 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2022-02-14 20:49:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 20:49:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-02-14 20:49:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:26,597 INFO L225 Difference]: With dead ends: 159 [2022-02-14 20:49:26,597 INFO L226 Difference]: Without dead ends: 159 [2022-02-14 20:49:26,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-02-14 20:49:26,597 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 237 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:26,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 74 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 20:49:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-14 20:49:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-02-14 20:49:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-14 20:49:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-02-14 20:49:26,608 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-02-14 20:49:26,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:26,608 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-02-14 20:49:26,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-14 20:49:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-02-14 20:49:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-14 20:49:26,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:26,611 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:26,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 20:49:26,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:49:26,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1349749463, now seen corresponding path program 5 times [2022-02-14 20:49:26,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:26,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969609907] [2022-02-14 20:49:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:26,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:49:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:49:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 20:49:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 20:49:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 20:49:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 20:49:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 20:49:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 20:49:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 20:49:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 20:49:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 20:49:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 20:49:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 20:49:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 20:49:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-02-14 20:49:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-02-14 20:49:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-02-14 20:49:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-02-14 20:49:27,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:27,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969609907] [2022-02-14 20:49:27,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969609907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:49:27,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532776443] [2022-02-14 20:49:27,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 20:49:27,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:49:27,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:49:27,191 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) [2022-02-14 20:49:27,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 20:50:03,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-02-14 20:50:03,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:50:03,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-14 20:50:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:50:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-02-14 20:50:03,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:50:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-02-14 20:50:04,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532776443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:50:04,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:50:04,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-02-14 20:50:04,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466929088] [2022-02-14 20:50:04,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:50:04,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-14 20:50:04,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:50:04,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-14 20:50:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-02-14 20:50:04,321 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-14 20:50:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:50:24,026 INFO L93 Difference]: Finished difference Result 287 states and 339 transitions. [2022-02-14 20:50:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-14 20:50:24,027 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-02-14 20:50:24,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:50:24,030 INFO L225 Difference]: With dead ends: 287 [2022-02-14 20:50:24,030 INFO L226 Difference]: Without dead ends: 287 [2022-02-14 20:50:24,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-02-14 20:50:24,031 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 603 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:50:24,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 148 Invalid, 3682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 3037 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-14 20:50:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-14 20:50:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-02-14 20:50:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-14 20:50:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-02-14 20:50:24,052 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-02-14 20:50:24,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:50:24,052 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-02-14 20:50:24,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-14 20:50:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-02-14 20:50:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-02-14 20:50:24,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:50:24,056 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:50:24,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 20:50:24,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:50:24,257 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:50:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:50:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1018698857, now seen corresponding path program 6 times [2022-02-14 20:50:24,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:50:24,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793759439] [2022-02-14 20:50:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:50:24,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:50:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:50:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:50:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:50:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 20:50:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 20:50:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 20:50:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 20:50:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 20:50:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 20:50:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 20:50:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 20:50:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 20:50:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 20:50:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:24,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 20:50:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 20:50:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 20:50:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 20:50:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-02-14 20:50:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-02-14 20:50:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-02-14 20:50:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-02-14 20:50:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-02-14 20:50:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-02-14 20:50:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-02-14 20:50:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-02-14 20:50:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-02-14 20:50:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-02-14 20:50:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-02-14 20:50:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-02-14 20:50:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-02-14 20:50:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-02-14 20:50:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-02-14 20:50:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-02-14 20:50:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-02-14 20:50:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:50:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-02-14 20:50:25,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:50:25,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793759439] [2022-02-14 20:50:25,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793759439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:50:25,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3172198] [2022-02-14 20:50:25,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 20:50:25,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:50:25,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:50:25,068 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) [2022-02-14 20:50:25,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process