/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-examples/standard_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:37:11,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:37:11,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:37:11,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:37:11,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:37:11,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:37:11,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:37:11,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:37:11,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:37:11,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:37:11,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:37:11,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:37:11,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:37:11,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:37:11,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:37:11,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:37:11,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:37:11,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:37:11,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:37:11,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:37:11,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:37:11,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:37:11,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:37:11,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:37:11,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:37:11,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:37:11,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:37:11,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:37:11,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:37:11,680 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:37:11,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:37:11,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:37:11,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:37:11,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:37:11,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:37:11,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:37:11,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:37:11,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:37:11,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:37:11,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:37:11,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:37:11,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:37:11,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:37:11,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:37:11,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:37:11,683 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:37:11,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:37:11,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:37:11,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:37:11,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:37:11,685 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:37:11,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:37:11,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:37:11,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:37:11,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:37:11,902 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:37:11,903 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:37:11,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2022-01-31 07:37:11,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097ceee39/fc63fb48219845ed8d4cab7936dc38a3/FLAG580f7998d [2022-01-31 07:37:12,270 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:37:12,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2022-01-31 07:37:12,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097ceee39/fc63fb48219845ed8d4cab7936dc38a3/FLAG580f7998d [2022-01-31 07:37:12,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097ceee39/fc63fb48219845ed8d4cab7936dc38a3 [2022-01-31 07:37:12,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:37:12,694 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:37:12,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:37:12,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:37:12,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:37:12,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:12,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc1e9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12, skipping insertion in model container [2022-01-31 07:37:12,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:12,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:37:12,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:37:12,856 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-examples/standard_copy1_ground-1.i[816,829] [2022-01-31 07:37:12,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:37:12,875 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:37:12,900 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-examples/standard_copy1_ground-1.i[816,829] [2022-01-31 07:37:12,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:37:12,959 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:37:12,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12 WrapperNode [2022-01-31 07:37:12,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:37:12,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:37:12,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:37:12,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:37:12,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:12,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:12,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:12,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:12,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:13,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:13,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:13,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:37:13,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:37:13,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:37:13,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:37:13,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (1/1) ... [2022-01-31 07:37:13,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:37:13,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:13,040 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 07:37:13,042 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 07:37:13,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:37:13,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:37:13,067 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:37:13,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:37:13,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:37:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:37:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:37:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:37:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:37:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:37:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:37:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:37:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:37:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:37:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:37:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:37:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:37:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:37:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:37:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:37:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:37:13,141 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:37:13,143 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:37:13,287 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:37:13,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:37:13,292 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 07:37:13,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:37:13 BoogieIcfgContainer [2022-01-31 07:37:13,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:37:13,294 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:37:13,295 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:37:13,295 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:37:13,297 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:37:13" (1/1) ... [2022-01-31 07:37:13,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:37:13 BasicIcfg [2022-01-31 07:37:13,314 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:37:13,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:37:13,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:37:13,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:37:13,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:37:12" (1/4) ... [2022-01-31 07:37:13,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eac2cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:37:13, skipping insertion in model container [2022-01-31 07:37:13,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:37:12" (2/4) ... [2022-01-31 07:37:13,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eac2cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:37:13, skipping insertion in model container [2022-01-31 07:37:13,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:37:13" (3/4) ... [2022-01-31 07:37:13,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eac2cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:37:13, skipping insertion in model container [2022-01-31 07:37:13,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:37:13" (4/4) ... [2022-01-31 07:37:13,323 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.iJordan [2022-01-31 07:37:13,327 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:37:13,328 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:37:13,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:37:13,371 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 07:37:13,371 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:37:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:37:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 07:37:13,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:13,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:13,401 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:13,405 INFO L85 PathProgramCache]: Analyzing trace with hash -839270659, now seen corresponding path program 1 times [2022-01-31 07:37:13,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:13,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556987804] [2022-01-31 07:37:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:13,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:13,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:13,586 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 07:37:13,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:13,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556987804] [2022-01-31 07:37:13,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556987804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:37:13,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:37:13,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:37:13,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907133625] [2022-01-31 07:37:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:37:13,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:37:13,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:37:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:37:13,637 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:13,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:13,675 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-01-31 07:37:13,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:37:13,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 07:37:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:13,682 INFO L225 Difference]: With dead ends: 27 [2022-01-31 07:37:13,682 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 07:37:13,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:37:13,690 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:13,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 07:37:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 07:37:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 07:37:13,712 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 07:37:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:13,712 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 07:37:13,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 07:37:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 07:37:13,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:13,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:13,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:37:13,714 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1759221441, now seen corresponding path program 1 times [2022-01-31 07:37:13,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:13,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284523774] [2022-01-31 07:37:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:13,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:13,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:13,771 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 07:37:13,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284523774] [2022-01-31 07:37:13,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284523774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:37:13,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:37:13,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:37:13,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969957406] [2022-01-31 07:37:13,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:37:13,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:37:13,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:37:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:37:13,775 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:13,833 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-01-31 07:37:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:37:13,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 07:37:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:13,834 INFO L225 Difference]: With dead ends: 24 [2022-01-31 07:37:13,834 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 07:37:13,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:37:13,836 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:13,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 07:37:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-31 07:37:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-31 07:37:13,841 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2022-01-31 07:37:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:13,841 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-31 07:37:13,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-31 07:37:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 07:37:13,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:13,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:13,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:37:13,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1271531299, now seen corresponding path program 1 times [2022-01-31 07:37:13,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:13,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589395242] [2022-01-31 07:37:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:13,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:13,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:13,930 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 07:37:13,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589395242] [2022-01-31 07:37:13,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589395242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:13,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499394429] [2022-01-31 07:37:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:13,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:13,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:13,933 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 07:37:13,944 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 07:37:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:37:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:37:14,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:37:14,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499394429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:37:14,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:37:14,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:37:14,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180013278] [2022-01-31 07:37:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:37:14,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:37:14,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:37:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:37:14,091 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:14,103 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 07:37:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:37:14,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 07:37:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:14,107 INFO L225 Difference]: With dead ends: 25 [2022-01-31 07:37:14,107 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 07:37:14,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:37:14,110 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:14,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 07:37:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-31 07:37:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 07:37:14,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-01-31 07:37:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:14,120 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 07:37:14,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 07:37:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 07:37:14,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:14,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:14,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 07:37:14,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:14,322 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash 852859995, now seen corresponding path program 1 times [2022-01-31 07:37:14,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:14,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589116216] [2022-01-31 07:37:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:14,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:14,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:37:14,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:14,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589116216] [2022-01-31 07:37:14,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589116216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:14,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003022736] [2022-01-31 07:37:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:14,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:14,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:14,395 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 07:37:14,417 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 07:37:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:37:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:37:14,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:37:14,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003022736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:14,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:14,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:37:14,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223859909] [2022-01-31 07:37:14,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:14,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:37:14,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:14,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:37:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:37:14,617 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:14,721 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-01-31 07:37:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:37:14,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 07:37:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:14,723 INFO L225 Difference]: With dead ends: 30 [2022-01-31 07:37:14,724 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 07:37:14,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:37:14,727 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:14,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:14,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 07:37:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 07:37:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-31 07:37:14,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 19 [2022-01-31 07:37:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:14,738 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-31 07:37:14,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-31 07:37:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 07:37:14,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:14,740 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:14,770 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 07:37:14,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 07:37:14,959 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash 218898357, now seen corresponding path program 2 times [2022-01-31 07:37:14,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:14,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284371691] [2022-01-31 07:37:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:14,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:15,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:15,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:15,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284371691] [2022-01-31 07:37:15,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284371691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:15,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125218835] [2022-01-31 07:37:15,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:37:15,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:15,043 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 07:37:15,044 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 07:37:15,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:37:15,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:37:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:15,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:15,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125218835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:15,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:15,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:37:15,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251221053] [2022-01-31 07:37:15,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:15,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:37:15,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:37:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:37:15,239 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:15,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:15,321 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-01-31 07:37:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:37:15,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 07:37:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:15,323 INFO L225 Difference]: With dead ends: 36 [2022-01-31 07:37:15,323 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 07:37:15,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:37:15,325 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:15,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:37:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 07:37:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 07:37:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 07:37:15,337 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2022-01-31 07:37:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:15,338 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 07:37:15,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 07:37:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 07:37:15,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:15,339 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:15,363 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 07:37:15,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:15,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1317253551, now seen corresponding path program 3 times [2022-01-31 07:37:15,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:15,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159309454] [2022-01-31 07:37:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:15,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:15,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:15,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159309454] [2022-01-31 07:37:15,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159309454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524719049] [2022-01-31 07:37:15,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:37:15,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:15,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:15,644 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 07:37:15,646 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 07:37:15,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 07:37:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:37:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:15,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:37:15,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524719049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:15,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:15,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-31 07:37:15,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446124264] [2022-01-31 07:37:15,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:15,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 07:37:15,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 07:37:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-31 07:37:15,909 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:16,143 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-01-31 07:37:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 07:37:16,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 07:37:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:16,145 INFO L225 Difference]: With dead ends: 51 [2022-01-31 07:37:16,145 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 07:37:16,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 07:37:16,146 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:16,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 07:37:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 07:37:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-01-31 07:37:16,150 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 31 [2022-01-31 07:37:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:16,150 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-01-31 07:37:16,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-01-31 07:37:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 07:37:16,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:16,159 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:16,178 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 07:37:16,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:16,368 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1044308417, now seen corresponding path program 4 times [2022-01-31 07:37:16,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:16,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079539583] [2022-01-31 07:37:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:16,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:16,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 07:37:16,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:16,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079539583] [2022-01-31 07:37:16,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079539583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:16,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710296384] [2022-01-31 07:37:16,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:37:16,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:16,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:16,477 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 07:37:16,479 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 07:37:16,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:37:16,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:16,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 07:37:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 07:37:16,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 07:37:16,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710296384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:16,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:16,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-31 07:37:16,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260728966] [2022-01-31 07:37:16,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:16,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 07:37:16,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 07:37:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:37:16,760 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:16,947 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-01-31 07:37:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:37:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 07:37:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:16,948 INFO L225 Difference]: With dead ends: 64 [2022-01-31 07:37:16,948 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 07:37:16,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:37:16,950 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:16,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 07:37:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 07:37:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-01-31 07:37:16,954 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 45 [2022-01-31 07:37:16,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:16,955 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-01-31 07:37:16,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-01-31 07:37:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 07:37:16,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:16,956 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:16,974 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 07:37:17,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:17,164 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 727404051, now seen corresponding path program 5 times [2022-01-31 07:37:17,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:17,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864769161] [2022-01-31 07:37:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:17,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:17,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 07:37:17,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:17,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864769161] [2022-01-31 07:37:17,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864769161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:17,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59930547] [2022-01-31 07:37:17,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:37:17,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:17,328 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 07:37:17,358 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 07:37:19,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-31 07:37:19,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:37:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 07:37:19,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 07:37:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59930547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:19,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:19,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 38 [2022-01-31 07:37:19,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754781728] [2022-01-31 07:37:19,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:19,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 07:37:19,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 07:37:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 07:37:19,961 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:20,641 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-01-31 07:37:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 07:37:20,642 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 07:37:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:20,643 INFO L225 Difference]: With dead ends: 91 [2022-01-31 07:37:20,643 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 07:37:20,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1140, Invalid=4116, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 07:37:20,645 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:20,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 56 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 07:37:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-01-31 07:37:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-01-31 07:37:20,651 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 59 [2022-01-31 07:37:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:20,652 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-01-31 07:37:20,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-01-31 07:37:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 07:37:20,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:20,653 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:20,677 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 07:37:20,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:20,864 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash -584734823, now seen corresponding path program 6 times [2022-01-31 07:37:20,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:20,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679381423] [2022-01-31 07:37:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:20,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:21,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 07:37:21,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:21,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679381423] [2022-01-31 07:37:21,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679381423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:21,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307016093] [2022-01-31 07:37:21,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:37:21,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:21,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:21,076 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 07:37:21,082 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 07:37:29,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-01-31 07:37:29,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:37:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-01-31 07:37:29,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-01-31 07:37:30,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307016093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:30,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:30,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 63 [2022-01-31 07:37:30,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191618706] [2022-01-31 07:37:30,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:30,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 07:37:30,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 07:37:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1249, Invalid=2657, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 07:37:30,459 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:31,918 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2022-01-31 07:37:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 07:37:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 07:37:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:31,920 INFO L225 Difference]: With dead ends: 141 [2022-01-31 07:37:31,920 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 07:37:31,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3741, Invalid=11265, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 07:37:31,926 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:31,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 46 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:37:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 07:37:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-01-31 07:37:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-01-31 07:37:31,933 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 85 [2022-01-31 07:37:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:31,934 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-01-31 07:37:31,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 62 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-01-31 07:37:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 07:37:31,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:31,935 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:31,967 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 07:37:32,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:32,153 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1607236231, now seen corresponding path program 7 times [2022-01-31 07:37:32,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:32,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401832599] [2022-01-31 07:37:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:32,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:32,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:32,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:32,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401832599] [2022-01-31 07:37:32,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401832599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:32,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922917074] [2022-01-31 07:37:32,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:37:32,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:32,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:32,392 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 07:37:32,403 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 07:37:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:32,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 07:37:32,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:32,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:33,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922917074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:33,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:33,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 07:37:33,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171005700] [2022-01-31 07:37:33,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:33,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 07:37:33,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:33,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 07:37:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 07:37:33,231 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:33,756 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2022-01-31 07:37:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 07:37:33,756 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 07:37:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:33,757 INFO L225 Difference]: With dead ends: 172 [2022-01-31 07:37:33,757 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 07:37:33,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 07:37:33,759 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:33,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 43 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:37:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 07:37:33,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-01-31 07:37:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-01-31 07:37:33,769 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 135 [2022-01-31 07:37:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:33,770 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-01-31 07:37:33,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-01-31 07:37:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 07:37:33,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:33,772 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:33,793 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 07:37:33,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 07:37:33,984 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash -203878297, now seen corresponding path program 8 times [2022-01-31 07:37:33,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:33,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506402136] [2022-01-31 07:37:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:33,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:34,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:34,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:34,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506402136] [2022-01-31 07:37:34,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506402136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:34,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124283541] [2022-01-31 07:37:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:37:34,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:34,536 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 07:37:34,537 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 07:37:34,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:37:34,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:37:34,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 07:37:34,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:37:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:34,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:37:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:36,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124283541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:37:36,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:37:36,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-01-31 07:37:36,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269500818] [2022-01-31 07:37:36,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:37:36,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 07:37:36,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:37:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 07:37:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 07:37:36,160 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:37:37,730 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2022-01-31 07:37:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 07:37:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 07:37:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:37:37,732 INFO L225 Difference]: With dead ends: 236 [2022-01-31 07:37:37,732 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 07:37:37,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6113, Invalid=10143, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 07:37:37,737 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 171 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:37:37,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 53 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:37:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 07:37:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-01-31 07:37:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:37:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2022-01-31 07:37:37,755 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 167 [2022-01-31 07:37:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:37:37,755 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2022-01-31 07:37:37,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:37:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2022-01-31 07:37:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 07:37:37,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:37:37,758 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:37:37,779 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 07:37:37,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:37,975 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:37:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:37:37,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1316766681, now seen corresponding path program 9 times [2022-01-31 07:37:37,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:37:37,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347588071] [2022-01-31 07:37:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:37:37,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:37:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:39,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:37:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:37:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5960 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 07:37:39,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:37:39,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347588071] [2022-01-31 07:37:39,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347588071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:37:39,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055474272] [2022-01-31 07:37:39,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:37:39,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:37:39,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:37:39,569 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 07:37:39,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process