/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-tiling/pr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:03:36,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:03:36,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:03:36,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:03:36,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:03:36,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:03:36,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:03:36,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:03:36,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:03:36,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:03:36,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:03:36,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:03:36,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:03:36,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:03:36,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:03:36,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:03:36,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:03:36,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:03:36,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:03:36,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:03:36,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:03:36,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:03:36,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:03:36,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:03:36,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:03:36,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:03:36,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:03:36,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:03:36,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:03:36,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:03:36,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:03:36,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:03:36,886 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:03:36,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:03:36,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:03:36,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:03:36,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:03:36,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:03:36,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:03:36,887 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:03:36,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:03:36,887 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:03:36,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:03:36,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:03:36,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:03:36,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:03:36,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:03:36,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:03:36,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:03:36,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:03:36,888 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:03:36,888 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:03:37,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:03:37,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:03:37,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:03:37,103 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:03:37,104 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:03:37,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr2.c [2022-01-31 09:03:37,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2374a245f/1fa207a23f604ecfa3b50b9b41709568/FLAG5ffc2a0f9 [2022-01-31 09:03:37,535 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:03:37,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr2.c [2022-01-31 09:03:37,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2374a245f/1fa207a23f604ecfa3b50b9b41709568/FLAG5ffc2a0f9 [2022-01-31 09:03:37,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2374a245f/1fa207a23f604ecfa3b50b9b41709568 [2022-01-31 09:03:37,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:03:37,556 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:03:37,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:03:37,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:03:37,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:03:37,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e99f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37, skipping insertion in model container [2022-01-31 09:03:37,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:03:37,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:03:37,735 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr2.c[394,407] [2022-01-31 09:03:37,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:03:37,768 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:03:37,779 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr2.c[394,407] [2022-01-31 09:03:37,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:03:37,796 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:03:37,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37 WrapperNode [2022-01-31 09:03:37,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:03:37,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:03:37,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:03:37,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:03:37,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:03:37,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:03:37,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:03:37,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:03:37,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (1/1) ... [2022-01-31 09:03:37,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:03:37,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:37,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 09:03:37,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 09:03:37,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:03:37,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:03:37,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:03:37,870 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:03:37,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:03:37,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:03:37,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:03:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:03:37,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:03:37,913 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:03:37,914 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:03:38,007 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:03:38,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:03:38,011 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:03:38,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:38 BoogieIcfgContainer [2022-01-31 09:03:38,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:03:38,013 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:03:38,013 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:03:38,014 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:03:38,016 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:38" (1/1) ... [2022-01-31 09:03:38,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:03:38 BasicIcfg [2022-01-31 09:03:38,028 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:03:38,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:03:38,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:03:38,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:03:38,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:03:37" (1/4) ... [2022-01-31 09:03:38,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761dd7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:03:38, skipping insertion in model container [2022-01-31 09:03:38,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:37" (2/4) ... [2022-01-31 09:03:38,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761dd7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:03:38, skipping insertion in model container [2022-01-31 09:03:38,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:38" (3/4) ... [2022-01-31 09:03:38,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761dd7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:03:38, skipping insertion in model container [2022-01-31 09:03:38,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:03:38" (4/4) ... [2022-01-31 09:03:38,033 INFO L111 eAbstractionObserver]: Analyzing ICFG pr2.cJordan [2022-01-31 09:03:38,044 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:03:38,044 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:03:38,079 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:03:38,084 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:03:38,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:03:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:03:38,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:38,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:38,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash -316811550, now seen corresponding path program 1 times [2022-01-31 09:03:38,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:38,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758994645] [2022-01-31 09:03:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:38,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:38,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:38,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758994645] [2022-01-31 09:03:38,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758994645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:38,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:38,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:03:38,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854774962] [2022-01-31 09:03:38,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:38,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:03:38,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:03:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:03:38,303 INFO L87 Difference]: Start difference. First operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:38,366 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-01-31 09:03:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:03:38,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:03:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:38,375 INFO L225 Difference]: With dead ends: 36 [2022-01-31 09:03:38,376 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 09:03:38,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:03:38,381 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:38,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 09:03:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 09:03:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 09:03:38,405 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2022-01-31 09:03:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:38,405 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 09:03:38,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 09:03:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:03:38,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:38,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:38,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:03:38,408 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:38,410 INFO L85 PathProgramCache]: Analyzing trace with hash -187728831, now seen corresponding path program 1 times [2022-01-31 09:03:38,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:38,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888708940] [2022-01-31 09:03:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:38,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:38,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:38,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888708940] [2022-01-31 09:03:38,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888708940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:38,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:38,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:03:38,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275756109] [2022-01-31 09:03:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:38,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:03:38,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:03:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:38,553 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:38,655 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-31 09:03:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:03:38,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:03:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:38,656 INFO L225 Difference]: With dead ends: 36 [2022-01-31 09:03:38,656 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 09:03:38,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:03:38,657 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:38,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:03:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 09:03:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 09:03:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 09:03:38,662 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2022-01-31 09:03:38,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:38,662 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 09:03:38,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 09:03:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:03:38,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:38,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:38,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:03:38,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:38,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash -186805310, now seen corresponding path program 1 times [2022-01-31 09:03:38,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:38,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209524896] [2022-01-31 09:03:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:38,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:38,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:38,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209524896] [2022-01-31 09:03:38,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209524896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:38,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:38,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:03:38,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937097059] [2022-01-31 09:03:38,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:03:38,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:03:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:38,797 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:38,859 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-01-31 09:03:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:03:38,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 09:03:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:38,863 INFO L225 Difference]: With dead ends: 39 [2022-01-31 09:03:38,863 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 09:03:38,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:03:38,866 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:38,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 35 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 09:03:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-01-31 09:03:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 09:03:38,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-01-31 09:03:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 09:03:38,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 09:03:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:03:38,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:38,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:38,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:03:38,871 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:38,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1933786315, now seen corresponding path program 1 times [2022-01-31 09:03:38,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276679636] [2022-01-31 09:03:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:38,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:39,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:39,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276679636] [2022-01-31 09:03:39,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276679636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:39,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355916637] [2022-01-31 09:03:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:39,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:39,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:39,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:39,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:03:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:39,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:03:39,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:39,285 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 16 treesize of output 12 [2022-01-31 09:03:39,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:39,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:03:39,377 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 15 treesize of output 7 [2022-01-31 09:03:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:39,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:39,475 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 15 treesize of output 13 [2022-01-31 09:03:39,478 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 24 treesize of output 22 [2022-01-31 09:03:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:39,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355916637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:39,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:39,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2022-01-31 09:03:39,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088705060] [2022-01-31 09:03:39,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:39,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 09:03:39,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 09:03:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:03:39,515 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:03:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:40,069 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2022-01-31 09:03:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 09:03:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-01-31 09:03:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:40,072 INFO L225 Difference]: With dead ends: 92 [2022-01-31 09:03:40,072 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 09:03:40,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 09:03:40,073 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 134 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:40,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 151 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:03:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 09:03:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 49. [2022-01-31 09:03:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-01-31 09:03:40,080 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 26 [2022-01-31 09:03:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:40,081 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-01-31 09:03:40,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:03:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-01-31 09:03:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:03:40,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:40,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:40,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:40,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:40,298 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash 136834956, now seen corresponding path program 1 times [2022-01-31 09:03:40,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:40,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118274229] [2022-01-31 09:03:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:40,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:40,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:40,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:40,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118274229] [2022-01-31 09:03:40,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118274229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:40,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:40,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:03:40,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973834586] [2022-01-31 09:03:40,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:40,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:03:40,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:03:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:03:40,358 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:40,428 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-01-31 09:03:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:03:40,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-01-31 09:03:40,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:40,429 INFO L225 Difference]: With dead ends: 55 [2022-01-31 09:03:40,429 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:03:40,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:40,430 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:40,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:03:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:03:40,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-31 09:03:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-31 09:03:40,434 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2022-01-31 09:03:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:40,434 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-31 09:03:40,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:40,435 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-31 09:03:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:03:40,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:40,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:40,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 09:03:40,436 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -59678549, now seen corresponding path program 1 times [2022-01-31 09:03:40,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997161111] [2022-01-31 09:03:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:40,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:40,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:40,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:40,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:40,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997161111] [2022-01-31 09:03:40,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997161111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:40,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061807318] [2022-01-31 09:03:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:40,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:40,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:40,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:40,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:03:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:40,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:03:40,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:40,615 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 16 treesize of output 12 [2022-01-31 09:03:40,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:40,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:03:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:40,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:40,732 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 15 treesize of output 13 [2022-01-31 09:03:40,733 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 24 treesize of output 22 [2022-01-31 09:03:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:40,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061807318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:40,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:40,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 16 [2022-01-31 09:03:40,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444266296] [2022-01-31 09:03:40,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:40,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 09:03:40,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 09:03:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-31 09:03:40,760 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:03:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:40,995 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2022-01-31 09:03:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:03:40,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-01-31 09:03:40,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:40,997 INFO L225 Difference]: With dead ends: 83 [2022-01-31 09:03:40,997 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 09:03:40,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:03:40,998 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:40,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 173 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:03:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 09:03:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2022-01-31 09:03:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 47 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-01-31 09:03:41,002 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 26 [2022-01-31 09:03:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:41,002 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-01-31 09:03:41,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:03:41,002 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-01-31 09:03:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 09:03:41,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:41,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:41,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:41,216 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,SelfDestructingSolverStorable5 [2022-01-31 09:03:41,216 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash -264821037, now seen corresponding path program 1 times [2022-01-31 09:03:41,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:41,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907517664] [2022-01-31 09:03:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:41,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:41,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:41,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:41,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907517664] [2022-01-31 09:03:41,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907517664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:41,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:41,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:03:41,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272073105] [2022-01-31 09:03:41,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:41,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:03:41,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:03:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:41,257 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:41,290 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2022-01-31 09:03:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:03:41,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 09:03:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:41,291 INFO L225 Difference]: With dead ends: 57 [2022-01-31 09:03:41,291 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 09:03:41,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:41,291 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:41,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 09:03:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-01-31 09:03:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-01-31 09:03:41,295 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 30 [2022-01-31 09:03:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:41,295 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-01-31 09:03:41,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-01-31 09:03:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 09:03:41,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:41,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:41,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 09:03:41,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1734294963, now seen corresponding path program 1 times [2022-01-31 09:03:41,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:41,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755120516] [2022-01-31 09:03:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:41,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:41,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:41,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 09:03:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:41,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:41,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755120516] [2022-01-31 09:03:41,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755120516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:41,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931657714] [2022-01-31 09:03:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:41,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:41,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:41,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:41,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:03:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:03:41,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:41,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:03:41,613 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 15 treesize of output 7 [2022-01-31 09:03:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:41,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:41,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:03:41,687 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 30 treesize of output 26 [2022-01-31 09:03:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:41,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931657714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:41,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:41,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-01-31 09:03:41,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084079816] [2022-01-31 09:03:41,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:41,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 09:03:41,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 09:03:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:03:41,714 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 09:03:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:41,967 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-01-31 09:03:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 09:03:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 35 [2022-01-31 09:03:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:41,969 INFO L225 Difference]: With dead ends: 75 [2022-01-31 09:03:41,969 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 09:03:41,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:03:41,969 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:41,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 130 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:03:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 09:03:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2022-01-31 09:03:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:03:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-01-31 09:03:41,973 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 35 [2022-01-31 09:03:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:41,973 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-01-31 09:03:41,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 09:03:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-01-31 09:03:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 09:03:41,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:41,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:41,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:42,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:42,187 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1716200462, now seen corresponding path program 1 times [2022-01-31 09:03:42,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:42,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423834616] [2022-01-31 09:03:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:42,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:42,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:42,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:42,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 09:03:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:42,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423834616] [2022-01-31 09:03:42,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423834616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807127190] [2022-01-31 09:03:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:42,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:42,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:42,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:03:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 09:03:42,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:42,369 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 22 treesize of output 18 [2022-01-31 09:03:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:42,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:42,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:03:42,536 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 30 treesize of output 26 [2022-01-31 09:03:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:42,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807127190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:42,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:42,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-31 09:03:42,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896925336] [2022-01-31 09:03:42,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:42,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:03:42,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:03:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:03:42,564 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:03:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:42,839 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-01-31 09:03:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:03:42,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-01-31 09:03:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:42,840 INFO L225 Difference]: With dead ends: 98 [2022-01-31 09:03:42,841 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 09:03:42,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:03:42,841 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 68 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:42,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 210 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 388 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-01-31 09:03:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 09:03:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2022-01-31 09:03:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 65 states have internal predecessors, (75), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:03:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2022-01-31 09:03:42,845 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 35 [2022-01-31 09:03:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:42,845 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2022-01-31 09:03:42,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:03:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2022-01-31 09:03:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 09:03:42,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:42,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:42,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:43,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:43,055 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash 192112933, now seen corresponding path program 1 times [2022-01-31 09:03:43,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:43,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661452934] [2022-01-31 09:03:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:43,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:03:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:03:43,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:43,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661452934] [2022-01-31 09:03:43,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661452934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:43,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:43,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:03:43,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203060379] [2022-01-31 09:03:43,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:43,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:03:43,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:03:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:43,085 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:03:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:43,118 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-01-31 09:03:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:03:43,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-01-31 09:03:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:43,119 INFO L225 Difference]: With dead ends: 80 [2022-01-31 09:03:43,119 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 09:03:43,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:43,120 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:43,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 63 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 09:03:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-01-31 09:03:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:03:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-01-31 09:03:43,123 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 39 [2022-01-31 09:03:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:43,123 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-01-31 09:03:43,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:03:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-01-31 09:03:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 09:03:43,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:43,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:43,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 09:03:43,124 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1626623755, now seen corresponding path program 2 times [2022-01-31 09:03:43,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:43,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549387800] [2022-01-31 09:03:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:43,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 09:03:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 09:03:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:03:43,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:43,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549387800] [2022-01-31 09:03:43,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549387800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:43,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252986277] [2022-01-31 09:03:43,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:03:43,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:43,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:43,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:43,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:03:43,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:03:43,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:43,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 09:03:43,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:03:43,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:03:43,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252986277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:43,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:43,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2022-01-31 09:03:43,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798494663] [2022-01-31 09:03:43,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:43,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:03:43,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:03:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:03:43,853 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:03:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:44,177 INFO L93 Difference]: Finished difference Result 128 states and 143 transitions. [2022-01-31 09:03:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 09:03:44,177 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 44 [2022-01-31 09:03:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:44,178 INFO L225 Difference]: With dead ends: 128 [2022-01-31 09:03:44,178 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 09:03:44,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 09:03:44,179 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 202 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:44,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 69 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:03:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 09:03:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-01-31 09:03:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 67 states have internal predecessors, (74), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:03:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-01-31 09:03:44,183 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 44 [2022-01-31 09:03:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:44,183 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-01-31 09:03:44,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:03:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-01-31 09:03:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 09:03:44,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:44,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:44,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:44,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 09:03:44,400 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:44,401 INFO L85 PathProgramCache]: Analyzing trace with hash 797154132, now seen corresponding path program 3 times [2022-01-31 09:03:44,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:44,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387372776] [2022-01-31 09:03:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:44,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:44,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:03:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 09:03:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:03:44,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:44,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387372776] [2022-01-31 09:03:44,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387372776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:44,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524525830] [2022-01-31 09:03:44,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:03:44,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:44,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:44,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:44,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:03:44,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:03:44,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:44,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 09:03:44,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:44,745 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 16 treesize of output 12 [2022-01-31 09:03:44,769 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:03:44,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:03:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:03:50,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:51,641 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 51 treesize of output 47 [2022-01-31 09:03:51,643 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 175 treesize of output 167 [2022-01-31 09:03:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:03:51,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524525830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:51,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:51,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 35 [2022-01-31 09:03:51,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258655961] [2022-01-31 09:03:51,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:51,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 09:03:51,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 09:03:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1045, Unknown=3, NotChecked=0, Total=1190 [2022-01-31 09:03:51,864 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 33 states have internal predecessors, (87), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:03:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:54,101 INFO L93 Difference]: Finished difference Result 162 states and 189 transitions. [2022-01-31 09:03:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 09:03:54,102 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 33 states have internal predecessors, (87), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2022-01-31 09:03:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:54,102 INFO L225 Difference]: With dead ends: 162 [2022-01-31 09:03:54,102 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 09:03:54,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=562, Invalid=4125, Unknown=5, NotChecked=0, Total=4692 [2022-01-31 09:03:54,104 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 250 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:54,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 355 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 942 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2022-01-31 09:03:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 09:03:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 97. [2022-01-31 09:03:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:03:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2022-01-31 09:03:54,109 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 48 [2022-01-31 09:03:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:54,110 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2022-01-31 09:03:54,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 33 states have internal predecessors, (87), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:03:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2022-01-31 09:03:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 09:03:54,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:54,110 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:54,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:54,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:54,311 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:54,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1463266788, now seen corresponding path program 4 times [2022-01-31 09:03:54,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:54,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949980020] [2022-01-31 09:03:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:54,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:54,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:54,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:54,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:03:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:54,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 09:03:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:54,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 09:03:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:03:54,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:54,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949980020] [2022-01-31 09:03:54,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949980020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:54,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833339511] [2022-01-31 09:03:54,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:03:54,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:54,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:54,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:54,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:03:54,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:03:54,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:54,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 09:03:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:54,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:03:54,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:03:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:03:54,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:54,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:03:54,954 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 34 treesize of output 30 [2022-01-31 09:03:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:03:55,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833339511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:55,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:55,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-01-31 09:03:55,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437470984] [2022-01-31 09:03:55,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:55,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:03:55,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:03:55,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:03:55,019 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:03:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:55,589 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2022-01-31 09:03:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 09:03:55,589 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 57 [2022-01-31 09:03:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:55,591 INFO L225 Difference]: With dead ends: 134 [2022-01-31 09:03:55,591 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 09:03:55,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1612, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 09:03:55,592 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:55,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 225 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:03:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 09:03:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2022-01-31 09:03:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 84 states have internal predecessors, (92), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 09:03:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-01-31 09:03:55,595 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 57 [2022-01-31 09:03:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:55,595 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-01-31 09:03:55,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:03:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-01-31 09:03:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 09:03:55,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:55,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:55,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:55,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:55,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash -142627738, now seen corresponding path program 2 times [2022-01-31 09:03:55,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:55,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472116159] [2022-01-31 09:03:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:55,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:55,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:55,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:55,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:03:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:55,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 09:03:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:55,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 09:03:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:03:55,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:55,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472116159] [2022-01-31 09:03:55,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472116159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:55,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218685775] [2022-01-31 09:03:55,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:03:55,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:55,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:55,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:56,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:03:56,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:03:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:03:56,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:56,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:03:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:03:56,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:02,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:04:02,846 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 30 treesize of output 26 [2022-01-31 09:04:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:02,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218685775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:02,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:02,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 28 [2022-01-31 09:04:02,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514344720] [2022-01-31 09:04:02,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:02,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 09:04:02,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 09:04:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=647, Unknown=4, NotChecked=0, Total=756 [2022-01-31 09:04:02,909 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 25 states have internal predecessors, (87), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:04:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:03,381 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2022-01-31 09:04:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 09:04:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 25 states have internal predecessors, (87), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 57 [2022-01-31 09:04:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:03,383 INFO L225 Difference]: With dead ends: 151 [2022-01-31 09:04:03,383 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 09:04:03,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=229, Invalid=1489, Unknown=4, NotChecked=0, Total=1722 [2022-01-31 09:04:03,384 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 124 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:03,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 356 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 737 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-01-31 09:04:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 09:04:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2022-01-31 09:04:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 93 states have (on average 1.118279569892473) internal successors, (104), 97 states have internal predecessors, (104), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:04:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2022-01-31 09:04:03,387 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 57 [2022-01-31 09:04:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:03,387 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2022-01-31 09:04:03,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 25 states have internal predecessors, (87), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:04:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2022-01-31 09:04:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 09:04:03,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:03,388 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:03,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:03,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 09:04:03,589 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash 759659860, now seen corresponding path program 5 times [2022-01-31 09:04:03,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:03,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238943208] [2022-01-31 09:04:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:03,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:03,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:03,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:03,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:04:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:03,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 09:04:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:03,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 09:04:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:03,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 09:04:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:03,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238943208] [2022-01-31 09:04:03,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238943208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537143709] [2022-01-31 09:04:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:04:03,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:03,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:03,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:04:03,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 09:04:03,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:03,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:04:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:04,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:04,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537143709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:04,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:04,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2022-01-31 09:04:04,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939635919] [2022-01-31 09:04:04,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:04,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 09:04:04,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:04,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 09:04:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 09:04:04,622 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:04:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:05,023 INFO L93 Difference]: Finished difference Result 213 states and 235 transitions. [2022-01-31 09:04:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 09:04:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 66 [2022-01-31 09:04:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:05,024 INFO L225 Difference]: With dead ends: 213 [2022-01-31 09:04:05,025 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 09:04:05,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 09:04:05,026 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 261 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:05,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 106 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:04:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 09:04:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2022-01-31 09:04:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 109 states have internal predecessors, (116), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:04:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2022-01-31 09:04:05,029 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 66 [2022-01-31 09:04:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:05,030 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2022-01-31 09:04:05,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:04:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2022-01-31 09:04:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:04:05,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:05,030 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:05,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:05,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 09:04:05,231 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash -130384675, now seen corresponding path program 6 times [2022-01-31 09:04:05,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:05,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634730591] [2022-01-31 09:04:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:05,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:05,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:05,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:04:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:05,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:04:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:05,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:04:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:05,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:04:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:05,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:05,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634730591] [2022-01-31 09:04:05,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634730591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:05,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772523994] [2022-01-31 09:04:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:04:05,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:05,459 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:05,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:04:05,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 09:04:05,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:05,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 09:04:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:05,636 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 16 treesize of output 12 [2022-01-31 09:04:05,663 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:04:05,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:04:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:07,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:08,033 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 25 treesize of output 23 [2022-01-31 09:04:08,035 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 88 treesize of output 84 [2022-01-31 09:04:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:08,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772523994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:08,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:08,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 41 [2022-01-31 09:04:08,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660015234] [2022-01-31 09:04:08,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:08,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 09:04:08,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 09:04:08,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 09:04:08,196 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:04:11,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:11,884 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2022-01-31 09:04:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 09:04:11,885 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 70 [2022-01-31 09:04:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:11,885 INFO L225 Difference]: With dead ends: 185 [2022-01-31 09:04:11,886 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 09:04:11,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 126 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=649, Invalid=5050, Unknown=1, NotChecked=0, Total=5700 [2022-01-31 09:04:11,887 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 200 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:11,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 360 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1198 Invalid, 0 Unknown, 305 Unchecked, 0.5s Time] [2022-01-31 09:04:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 09:04:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 144. [2022-01-31 09:04:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 120 states have internal predecessors, (127), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 09:04:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2022-01-31 09:04:11,891 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 70 [2022-01-31 09:04:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:11,891 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2022-01-31 09:04:11,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:04:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2022-01-31 09:04:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:04:11,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:11,892 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:11,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:12,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 09:04:12,104 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1116262598, now seen corresponding path program 3 times [2022-01-31 09:04:12,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:12,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576225870] [2022-01-31 09:04:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:12,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:12,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:12,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:12,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:04:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:04:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:12,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:04:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:12,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:04:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:12,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576225870] [2022-01-31 09:04:12,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576225870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792644364] [2022-01-31 09:04:12,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:04:12,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:12,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:12,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:12,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:04:12,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 09:04:12,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:12,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:04:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:12,498 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 16 treesize of output 12 [2022-01-31 09:04:12,525 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:04:12,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:04:12,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:04:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:12,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:12,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:04:12,870 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 30 treesize of output 26 [2022-01-31 09:04:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:12,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792644364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:12,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:12,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 30 [2022-01-31 09:04:12,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957037224] [2022-01-31 09:04:12,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:12,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:04:12,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:04:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:04:12,911 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:04:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:14,044 INFO L93 Difference]: Finished difference Result 223 states and 258 transitions. [2022-01-31 09:04:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 09:04:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 70 [2022-01-31 09:04:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:14,045 INFO L225 Difference]: With dead ends: 223 [2022-01-31 09:04:14,045 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 09:04:14,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=442, Invalid=3098, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 09:04:14,046 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 196 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:14,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 316 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 09:04:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 09:04:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2022-01-31 09:04:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 125 states have (on average 1.112) internal successors, (139), 130 states have internal predecessors, (139), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 09:04:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2022-01-31 09:04:14,050 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 70 [2022-01-31 09:04:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:14,050 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2022-01-31 09:04:14,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:04:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2022-01-31 09:04:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:04:14,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:14,051 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:14,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:14,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 09:04:14,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1613707139, now seen corresponding path program 1 times [2022-01-31 09:04:14,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:14,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106212185] [2022-01-31 09:04:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:14,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:14,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:14,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:14,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:04:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:14,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:04:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:14,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:04:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:14,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:04:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:14,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:14,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106212185] [2022-01-31 09:04:14,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106212185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810757529] [2022-01-31 09:04:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:14,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:14,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:14,429 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:14,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:04:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 09:04:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:14,519 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 16 treesize of output 12 [2022-01-31 09:04:14,533 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:04:14,533 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 29 treesize of output 28 [2022-01-31 09:04:41,663 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:04:41,664 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 42 treesize of output 20 [2022-01-31 09:04:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:41,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:43,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:04:43,807 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 30 treesize of output 26 [2022-01-31 09:04:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:04:43,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810757529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:43,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:43,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 23 [2022-01-31 09:04:43,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53836708] [2022-01-31 09:04:43,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:43,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 09:04:43,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 09:04:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=437, Unknown=5, NotChecked=0, Total=506 [2022-01-31 09:04:43,854 INFO L87 Difference]: Start difference. First operand 156 states and 178 transitions. Second operand has 23 states, 22 states have (on average 3.5) internal successors, (77), 20 states have internal predecessors, (77), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 09:04:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:50,016 INFO L93 Difference]: Finished difference Result 247 states and 275 transitions. [2022-01-31 09:04:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 09:04:50,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 20 states have internal predecessors, (77), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 70 [2022-01-31 09:04:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:50,018 INFO L225 Difference]: With dead ends: 247 [2022-01-31 09:04:50,018 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 09:04:50,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 134 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=268, Invalid=2073, Unknown=11, NotChecked=0, Total=2352 [2022-01-31 09:04:50,019 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:50,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 391 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1166 Invalid, 0 Unknown, 86 Unchecked, 0.5s Time] [2022-01-31 09:04:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 09:04:50,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 191. [2022-01-31 09:04:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 150 states have (on average 1.1) internal successors, (165), 157 states have internal predecessors, (165), 23 states have call successors, (23), 18 states have call predecessors, (23), 17 states have return successors, (22), 15 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:04:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-01-31 09:04:50,023 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 70 [2022-01-31 09:04:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:50,024 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-01-31 09:04:50,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 20 states have internal predecessors, (77), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 09:04:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-01-31 09:04:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 09:04:50,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:50,024 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:50,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:50,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 09:04:50,225 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1888820414, now seen corresponding path program 4 times [2022-01-31 09:04:50,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058506545] [2022-01-31 09:04:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:50,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:04:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:04:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:04:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:04:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:04:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 80 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:04:50,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:50,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058506545] [2022-01-31 09:04:50,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058506545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:50,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464104549] [2022-01-31 09:04:50,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:04:50,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:50,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:50,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:04:50,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:04:50,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:04:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 09:04:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:50,566 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 16 treesize of output 12 [2022-01-31 09:05:36,088 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:05:36,088 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 42 treesize of output 20 [2022-01-31 09:05:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 90 refuted. 16 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:36,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:40,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:05:40,241 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 30 treesize of output 26 [2022-01-31 09:05:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 80 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:05:40,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464104549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:40,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:40,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15] total 26 [2022-01-31 09:05:40,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971686349] [2022-01-31 09:05:40,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:40,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:05:40,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:40,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:05:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=556, Unknown=13, NotChecked=0, Total=650 [2022-01-31 09:05:40,287 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 26 states, 25 states have (on average 3.44) internal successors, (86), 23 states have internal predecessors, (86), 12 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 09:06:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:04,556 INFO L93 Difference]: Finished difference Result 415 states and 470 transitions. [2022-01-31 09:06:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 09:06:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.44) internal successors, (86), 23 states have internal predecessors, (86), 12 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 79 [2022-01-31 09:06:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:04,558 INFO L225 Difference]: With dead ends: 415 [2022-01-31 09:06:04,558 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 09:06:04,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 158 SyntacticMatches, 16 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 72.9s TimeCoverageRelationStatistics Valid=493, Invalid=4305, Unknown=32, NotChecked=0, Total=4830 [2022-01-31 09:06:04,559 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 133 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:04,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 696 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2062 Invalid, 0 Unknown, 116 Unchecked, 0.8s Time] [2022-01-31 09:06:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 09:06:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 311. [2022-01-31 09:06:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 245 states have (on average 1.1183673469387756) internal successors, (274), 258 states have internal predecessors, (274), 37 states have call successors, (37), 29 states have call predecessors, (37), 28 states have return successors, (36), 23 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 09:06:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 347 transitions. [2022-01-31 09:06:04,573 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 347 transitions. Word has length 79 [2022-01-31 09:06:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:04,573 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 347 transitions. [2022-01-31 09:06:04,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.44) internal successors, (86), 23 states have internal predecessors, (86), 12 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 09:06:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 347 transitions. [2022-01-31 09:06:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 09:06:04,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:04,574 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:04,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:06:04,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:04,791 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:04,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:04,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1150709405, now seen corresponding path program 7 times [2022-01-31 09:06:04,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:04,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876166283] [2022-01-31 09:06:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:04,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:06:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 09:06:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:06:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:06:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:06:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:06:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:06:05,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:05,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876166283] [2022-01-31 09:06:05,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876166283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:05,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124656675] [2022-01-31 09:06:05,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:06:05,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:05,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:05,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:06:05,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 09:06:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:05,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:06:05,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:06:05,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:06:06,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124656675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:06,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:06,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 43 [2022-01-31 09:06:06,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236958958] [2022-01-31 09:06:06,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:06,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 09:06:06,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 09:06:06,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 09:06:06,100 INFO L87 Difference]: Start difference. First operand 311 states and 347 transitions. Second operand has 43 states, 43 states have (on average 3.372093023255814) internal successors, (145), 42 states have internal predecessors, (145), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:06:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:06,602 INFO L93 Difference]: Finished difference Result 478 states and 531 transitions. [2022-01-31 09:06:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:06:06,602 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.372093023255814) internal successors, (145), 42 states have internal predecessors, (145), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 88 [2022-01-31 09:06:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:06,604 INFO L225 Difference]: With dead ends: 478 [2022-01-31 09:06:06,604 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 09:06:06,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=655, Invalid=2207, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 09:06:06,605 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 237 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:06,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 163 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:06:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 09:06:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 315. [2022-01-31 09:06:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 249 states have (on average 1.108433734939759) internal successors, (276), 262 states have internal predecessors, (276), 37 states have call successors, (37), 29 states have call predecessors, (37), 28 states have return successors, (36), 23 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 09:06:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 349 transitions. [2022-01-31 09:06:06,655 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 349 transitions. Word has length 88 [2022-01-31 09:06:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:06,655 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 349 transitions. [2022-01-31 09:06:06,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.372093023255814) internal successors, (145), 42 states have internal predecessors, (145), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:06:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 349 transitions. [2022-01-31 09:06:06,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 09:06:06,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:06,660 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:06,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-31 09:06:06,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:06,876 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1975832218, now seen corresponding path program 8 times [2022-01-31 09:06:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:06,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882671063] [2022-01-31 09:06:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:06,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:06:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:06:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 09:06:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 09:06:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 09:06:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 09:06:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:06:07,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882671063] [2022-01-31 09:06:07,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882671063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:07,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15244452] [2022-01-31 09:06:07,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:06:07,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:07,179 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:06:07,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 09:06:07,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:06:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:06:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 09:06:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:07,424 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 16 treesize of output 12 [2022-01-31 09:06:07,453 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:06:07,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:07:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:07:13,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:14,297 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 35 treesize of output 31 [2022-01-31 09:07:14,299 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 67 treesize of output 59 [2022-01-31 09:07:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:07:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15244452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:14,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:14,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 20] total 53 [2022-01-31 09:07:14,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814777512] [2022-01-31 09:07:14,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 09:07:14,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 09:07:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2543, Unknown=7, NotChecked=0, Total=2756 [2022-01-31 09:07:14,678 INFO L87 Difference]: Start difference. First operand 315 states and 349 transitions. Second operand has 53 states, 53 states have (on average 3.0) internal successors, (159), 51 states have internal predecessors, (159), 24 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:07:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:07:28,855 INFO L93 Difference]: Finished difference Result 424 states and 484 transitions. [2022-01-31 09:07:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 09:07:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0) internal successors, (159), 51 states have internal predecessors, (159), 24 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 92 [2022-01-31 09:07:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:07:28,857 INFO L225 Difference]: With dead ends: 424 [2022-01-31 09:07:28,857 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 09:07:28,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 156 SyntacticMatches, 18 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3897 ImplicationChecksByTransitivity, 79.8s TimeCoverageRelationStatistics Valid=972, Invalid=12354, Unknown=14, NotChecked=0, Total=13340 [2022-01-31 09:07:28,861 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 208 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:07:28,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1095 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2362 Invalid, 0 Unknown, 99 Unchecked, 1.2s Time] [2022-01-31 09:07:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 09:07:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2022-01-31 09:07:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 274 states have (on average 1.1094890510948905) internal successors, (304), 289 states have internal predecessors, (304), 45 states have call successors, (45), 31 states have call predecessors, (45), 29 states have return successors, (44), 28 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-31 09:07:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 393 transitions. [2022-01-31 09:07:28,874 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 393 transitions. Word has length 92 [2022-01-31 09:07:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:07:28,874 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 393 transitions. [2022-01-31 09:07:28,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0) internal successors, (159), 51 states have internal predecessors, (159), 24 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 09:07:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 393 transitions. [2022-01-31 09:07:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 09:07:28,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:07:28,876 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:07:28,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 09:07:29,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:29,093 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:07:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:07:29,093 INFO L85 PathProgramCache]: Analyzing trace with hash 157606214, now seen corresponding path program 5 times [2022-01-31 09:07:29,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:07:29,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312646639] [2022-01-31 09:07:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:07:29,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:07:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:29,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:07:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:07:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:07:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:29,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 09:07:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:29,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 09:07:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:29,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 09:07:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:29,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 09:07:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 59 proven. 75 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 09:07:29,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:07:29,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312646639] [2022-01-31 09:07:29,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312646639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:07:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170015198] [2022-01-31 09:07:29,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:07:29,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:29,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:07:29,504 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:07:29,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 09:07:29,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 09:07:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:07:29,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 09:07:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:07:29,691 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 16 treesize of output 12 [2022-01-31 09:07:29,738 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:29,739 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 26 treesize of output 25 [2022-01-31 09:07:29,755 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:29,755 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 26 treesize of output 25 [2022-01-31 09:07:29,789 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:29,789 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 26 treesize of output 25 [2022-01-31 09:07:29,803 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:29,804 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 26 treesize of output 25 [2022-01-31 09:07:29,844 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:29,844 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 26 treesize of output 25 [2022-01-31 09:07:29,856 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:29,856 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 26 treesize of output 25 [2022-01-31 09:07:29,893 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:29,894 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 26 treesize of output 25 [2022-01-31 09:07:29,916 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:29,916 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 26 treesize of output 25 [2022-01-31 09:07:30,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:07:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 88 proven. 66 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 09:07:30,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:33,482 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_207 Int)) (or (forall ((v_ArrVal_456 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_207)))) is different from false [2022-01-31 09:07:37,670 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_208 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_451 Int) (v_main_~i~0_207 Int) (v_ArrVal_449 Int)) (or (< (select (store (let ((.cse0 (* 8 v_main_~i~0_208))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_208)))) is different from false [2022-01-31 09:07:53,551 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_209 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_451 Int) (v_main_~i~0_207 Int) (v_main_~i~0_208 Int) (v_ArrVal_449 Int) (v_ArrVal_447 Int) (v_ArrVal_446 Int)) (or (not (<= (+ v_main_~i~0_209 1) v_main_~i~0_208)) (< (select (store (let ((.cse1 (* 8 v_main_~i~0_208))) (store (store (let ((.cse0 (* 8 v_main_~i~0_209))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_446) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_447)) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse1 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_209)))) is different from false [2022-01-31 09:08:13,442 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_210 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_444 Int) (v_ArrVal_451 Int) (v_main_~i~0_209 Int) (v_main_~i~0_207 Int) (v_main_~i~0_208 Int) (v_ArrVal_449 Int) (v_ArrVal_447 Int) (v_ArrVal_446 Int)) (or (< (select (store (let ((.cse1 (* 8 v_main_~i~0_208))) (store (store (let ((.cse0 (* 8 v_main_~i~0_209))) (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) (* 8 v_main_~i~0_210) |c_main_~#volArray~0.offset|) v_ArrVal_444) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_446) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_447)) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse1 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_209 1) v_main_~i~0_208)) (not (<= (+ v_main_~i~0_210 1) v_main_~i~0_209)) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_210)))) is different from false [2022-01-31 09:08:13,460 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 65 treesize of output 63 [2022-01-31 09:08:13,476 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 55336 treesize of output 55272 [2022-01-31 09:17:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 56 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 14 not checked. [2022-01-31 09:17:48,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170015198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:17:48,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:17:48,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 50 [2022-01-31 09:17:48,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863449625] [2022-01-31 09:17:48,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:17:48,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:17:48,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:17:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:17:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1744, Unknown=25, NotChecked=364, Total=2450 [2022-01-31 09:17:48,512 INFO L87 Difference]: Start difference. First operand 349 states and 393 transitions. Second operand has 50 states, 50 states have (on average 3.02) internal successors, (151), 49 states have internal predecessors, (151), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:17:50,666 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_main_~i~0 8) (- 4) |c_main_~#volArray~0.offset|))) (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) .cse0) 0) (<= (+ c_main_~CCCELVOL1~0 1) c_main_~MINVAL~0) (= .cse0 12) (forall ((v_main_~i~0_210 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_444 Int) (v_ArrVal_451 Int) (v_main_~i~0_209 Int) (v_main_~i~0_207 Int) (v_main_~i~0_208 Int) (v_ArrVal_449 Int) (v_ArrVal_447 Int) (v_ArrVal_446 Int)) (or (< (select (store (let ((.cse2 (* 8 v_main_~i~0_208))) (store (store (let ((.cse1 (* 8 v_main_~i~0_209))) (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) (* 8 v_main_~i~0_210) |c_main_~#volArray~0.offset|) v_ArrVal_444) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_446) (+ .cse1 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_447)) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse2 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_209 1) v_main_~i~0_208)) (not (<= (+ v_main_~i~0_210 1) v_main_~i~0_209)) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_210)))) (= |c_main_~#volArray~0.offset| 0) (= (+ (- 1) c_main_~CCCELVOL1~0) 0))) is different from false [2022-01-31 09:17:52,674 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_main_~i~0 8) (- 4) |c_main_~#volArray~0.offset|)) (.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|))) (and (= (select .cse0 .cse1) 0) (<= (+ c_main_~CCCELVOL1~0 1) c_main_~MINVAL~0) (= .cse1 12) (forall ((v_main_~i~0_210 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_444 Int) (v_ArrVal_451 Int) (v_main_~i~0_209 Int) (v_main_~i~0_207 Int) (v_main_~i~0_208 Int) (v_ArrVal_449 Int) (v_ArrVal_447 Int) (v_ArrVal_446 Int)) (or (< (select (store (let ((.cse3 (* 8 v_main_~i~0_208))) (store (store (let ((.cse2 (* 8 v_main_~i~0_209))) (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) (* 8 v_main_~i~0_210) |c_main_~#volArray~0.offset|) v_ArrVal_444) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_446) (+ .cse2 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_447)) (+ .cse3 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse3 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_209 1) v_main_~i~0_208)) (not (<= (+ v_main_~i~0_210 1) v_main_~i~0_209)) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_210)))) (= |c_main_~#volArray~0.offset| 0) (= (+ (- 1) c_main_~CCCELVOL1~0) 0) (< (select .cse0 (+ (* c_main_~i~0 4) |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0))) is different from false [2022-01-31 09:17:54,718 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) 12) 0) (forall ((v_main_~i~0_207 Int)) (or (forall ((v_ArrVal_456 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_207)))) (forall ((v_main_~i~0_209 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_451 Int) (v_main_~i~0_207 Int) (v_main_~i~0_208 Int) (v_ArrVal_449 Int) (v_ArrVal_447 Int) (v_ArrVal_446 Int)) (or (not (<= (+ v_main_~i~0_209 1) v_main_~i~0_208)) (< (select (store (let ((.cse1 (* 8 v_main_~i~0_208))) (store (store (let ((.cse0 (* 8 v_main_~i~0_209))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_446) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_447)) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse1 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_209)))) (<= (+ c_main_~CCCELVOL1~0 1) c_main_~MINVAL~0) (= |c_main_~#volArray~0.offset| 0) (forall ((v_main_~i~0_208 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_451 Int) (v_main_~i~0_207 Int) (v_ArrVal_449 Int)) (or (< (select (store (let ((.cse2 (* 8 v_main_~i~0_208))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse2 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_208)))) (<= (+ (div (+ 16 (* (- 1) |c_main_~#volArray~0.offset|)) 8) 1) c_main_~i~0) (= c_main_~CCCELVOL1~0 1)) is different from false [2022-01-31 09:17:56,748 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ 2 (div (+ 16 (* (- 1) |c_main_~#volArray~0.offset|)) 8)) c_main_~i~0) (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) 12) 0) (forall ((v_main_~i~0_207 Int)) (or (forall ((v_ArrVal_456 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_207)))) (forall ((v_main_~i~0_209 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_451 Int) (v_main_~i~0_207 Int) (v_main_~i~0_208 Int) (v_ArrVal_449 Int) (v_ArrVal_447 Int) (v_ArrVal_446 Int)) (or (not (<= (+ v_main_~i~0_209 1) v_main_~i~0_208)) (< (select (store (let ((.cse1 (* 8 v_main_~i~0_208))) (store (store (let ((.cse0 (* 8 v_main_~i~0_209))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_446) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_447)) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse1 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_209)))) (<= (+ c_main_~CCCELVOL1~0 1) c_main_~MINVAL~0) (= |c_main_~#volArray~0.offset| 0) (forall ((v_main_~i~0_208 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_451 Int) (v_main_~i~0_207 Int) (v_ArrVal_449 Int)) (or (< (select (store (let ((.cse2 (* 8 v_main_~i~0_208))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse2 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_208)))) (= c_main_~CCCELVOL1~0 1)) is different from false [2022-01-31 09:17:58,833 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) 12) 0) (forall ((v_main_~i~0_207 Int)) (or (forall ((v_ArrVal_456 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_207)))) (forall ((v_main_~i~0_209 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_451 Int) (v_main_~i~0_207 Int) (v_main_~i~0_208 Int) (v_ArrVal_449 Int) (v_ArrVal_447 Int) (v_ArrVal_446 Int)) (or (not (<= (+ v_main_~i~0_209 1) v_main_~i~0_208)) (< (select (store (let ((.cse1 (* 8 v_main_~i~0_208))) (store (store (let ((.cse0 (* 8 v_main_~i~0_209))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_446) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_447)) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse1 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_209)))) (<= (+ c_main_~CCCELVOL1~0 1) c_main_~MINVAL~0) (= |c_main_~#volArray~0.offset| 0) (forall ((v_main_~i~0_208 Int)) (or (forall ((v_ArrVal_456 Int) (v_ArrVal_451 Int) (v_main_~i~0_207 Int) (v_ArrVal_449 Int)) (or (< (select (store (let ((.cse2 (* 8 v_main_~i~0_208))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_449) (+ .cse2 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_451)) (+ (* 8 v_main_~i~0_207) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_456) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_208 1) v_main_~i~0_207)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_208)))) (<= (+ 3 (div (+ 16 (* (- 1) |c_main_~#volArray~0.offset|)) 8)) c_main_~i~0) (= c_main_~CCCELVOL1~0 1)) is different from false [2022-01-31 09:17:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:17:59,209 INFO L93 Difference]: Finished difference Result 370 states and 418 transitions. [2022-01-31 09:17:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 09:17:59,210 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.02) internal successors, (151), 49 states have internal predecessors, (151), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 91 [2022-01-31 09:17:59,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:17:59,211 INFO L225 Difference]: With dead ends: 370 [2022-01-31 09:17:59,211 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 09:17:59,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=469, Invalid=2617, Unknown=30, NotChecked=1044, Total=4160 [2022-01-31 09:17:59,212 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 123 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:17:59,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 452 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1132 Invalid, 0 Unknown, 531 Unchecked, 0.5s Time] [2022-01-31 09:17:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 09:17:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 347. [2022-01-31 09:17:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 274 states have (on average 1.094890510948905) internal successors, (300), 287 states have internal predecessors, (300), 43 states have call successors, (43), 31 states have call predecessors, (43), 29 states have return successors, (42), 28 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 09:17:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 385 transitions. [2022-01-31 09:17:59,218 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 385 transitions. Word has length 91 [2022-01-31 09:17:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:17:59,218 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 385 transitions. [2022-01-31 09:17:59,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.02) internal successors, (151), 49 states have internal predecessors, (151), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:17:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 385 transitions. [2022-01-31 09:17:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 09:17:59,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:17:59,219 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:17:59,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 09:17:59,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-31 09:17:59,420 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:17:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:17:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1402370695, now seen corresponding path program 6 times [2022-01-31 09:17:59,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:17:59,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488229809] [2022-01-31 09:17:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:17:59,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:17:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:59,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:17:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:59,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:17:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:17:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:59,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 09:17:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:59,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 09:17:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 09:17:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:59,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 09:17:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 14 proven. 127 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:17:59,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:17:59,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488229809] [2022-01-31 09:17:59,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488229809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:17:59,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955784309] [2022-01-31 09:17:59,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:17:59,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:17:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:17:59,664 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:17:59,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 09:17:59,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 09:17:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:17:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 09:17:59,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:17:59,873 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 16 treesize of output 12 [2022-01-31 09:17:59,905 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:17:59,906 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 26 treesize of output 25 [2022-01-31 09:17:59,919 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:17:59,919 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 26 treesize of output 25 [2022-01-31 09:17:59,937 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:17:59,937 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 26 treesize of output 25 [2022-01-31 09:17:59,950 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:17:59,950 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 26 treesize of output 25