/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:23:20,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:23:20,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:23:20,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 12:23:20,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:23:20,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:23:20,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:23:20,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:23:20,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:23:20,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:23:20,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:23:20,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:23:20,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:23:20,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:23:20,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:23:20,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:23:20,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:23:20,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:23:20,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:23:20,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:23:20,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:23:20,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:23:20,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:23:20,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:23:20,322 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:23:20,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:23:20,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:23:20,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:23:20,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:23:20,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:23:20,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:23:20,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:23:20,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:23:20,325 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:23:20,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:23:20,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:23:20,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:23:20,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:23:20,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:23:20,539 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:23:20,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-01-31 12:23:20,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa704972e/94b43b44a5074e97ad068844016c88ea/FLAGed98f70bd [2022-01-31 12:23:20,917 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:23:20,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-01-31 12:23:20,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa704972e/94b43b44a5074e97ad068844016c88ea/FLAGed98f70bd [2022-01-31 12:23:21,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa704972e/94b43b44a5074e97ad068844016c88ea [2022-01-31 12:23:21,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:23:21,343 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:23:21,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:23:21,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:23:21,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:23:21,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a31d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21, skipping insertion in model container [2022-01-31 12:23:21,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:23:21,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:23:21,517 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-01-31 12:23:21,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:23:21,559 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:23:21,567 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-01-31 12:23:21,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:23:21,583 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:23:21,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21 WrapperNode [2022-01-31 12:23:21,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:23:21,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:23:21,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:23:21,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:23:21,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:23:21,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:23:21,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:23:21,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:23:21,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:23:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:23:21,627 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 12:23:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:23:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:23:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:23:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 12:23:21,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 12:23:21,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:23:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 12:23:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:23:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 12:23:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:23:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:23:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:23:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:23:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:23:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:23:21,643 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 12:23:21,705 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:23:21,706 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:23:21,789 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:23:21,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:23:21,794 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 12:23:21,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:23:21 BoogieIcfgContainer [2022-01-31 12:23:21,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:23:21,796 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:23:21,796 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:23:21,796 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:23:21,798 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:23:21" (1/1) ... [2022-01-31 12:23:21,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:23:21 BasicIcfg [2022-01-31 12:23:21,809 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:23:21,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:23:21,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:23:21,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:23:21,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:23:21" (1/4) ... [2022-01-31 12:23:21,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f418a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:23:21, skipping insertion in model container [2022-01-31 12:23:21,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:23:21" (2/4) ... [2022-01-31 12:23:21,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f418a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:23:21, skipping insertion in model container [2022-01-31 12:23:21,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:23:21" (3/4) ... [2022-01-31 12:23:21,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f418a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:23:21, skipping insertion in model container [2022-01-31 12:23:21,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:23:21" (4/4) ... [2022-01-31 12:23:21,814 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.iJordan [2022-01-31 12:23:21,818 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:23:21,818 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:23:21,845 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:23:21,850 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 12:23:21,850 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:23:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 12:23:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 12:23:21,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:23:21,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:23:21,865 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:23:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:23:21,869 INFO L85 PathProgramCache]: Analyzing trace with hash -183287108, now seen corresponding path program 1 times [2022-01-31 12:23:21,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:23:21,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654113633] [2022-01-31 12:23:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:23:21,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:23:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:22,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:23:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:22,095 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 12:23:22,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:23:22,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654113633] [2022-01-31 12:23:22,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654113633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:23:22,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:23:22,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 12:23:22,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896036759] [2022-01-31 12:23:22,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:23:22,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 12:23:22,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:23:22,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 12:23:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 12:23:22,121 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:23:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:23:22,197 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-01-31 12:23:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 12:23:22,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 12:23:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:23:22,204 INFO L225 Difference]: With dead ends: 38 [2022-01-31 12:23:22,204 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 12:23:22,206 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 12:23:22,208 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:23:22,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:23:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 12:23:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-01-31 12:23:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:23:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-01-31 12:23:22,233 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-01-31 12:23:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:23:22,234 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-01-31 12:23:22,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:23:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-01-31 12:23:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 12:23:22,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:23:22,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:23:22,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:23:22,235 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:23:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:23:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash 364957256, now seen corresponding path program 1 times [2022-01-31 12:23:22,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:23:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476194845] [2022-01-31 12:23:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:23:22,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:23:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:22,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:23:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:23:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:22,337 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 12:23:22,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:23:22,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476194845] [2022-01-31 12:23:22,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476194845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:23:22,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626311024] [2022-01-31 12:23:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:23:22,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:23:22,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:23:22,356 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 12:23:22,368 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 12:23:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 12:23:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:23:22,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 12:23:22,691 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 12:23:22,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-01-31 12:23:22,900 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 12:23:22,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:23:23,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-01-31 12:23:23,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 12:23:23,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2022-01-31 12:23:23,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2022-01-31 12:23:23,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-01-31 12:23:23,129 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-31 12:23:23,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2022-01-31 12:23:23,390 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 12:23:23,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626311024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:23:23,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:23:23,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-01-31 12:23:23,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120002036] [2022-01-31 12:23:23,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:23:23,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 12:23:23,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:23:23,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 12:23:23,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-31 12:23:23,393 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 12:23:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:23:23,755 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-01-31 12:23:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 12:23:23,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-01-31 12:23:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:23:23,756 INFO L225 Difference]: With dead ends: 41 [2022-01-31 12:23:23,756 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 12:23:23,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-01-31 12:23:23,758 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:23:23,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:23:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 12:23:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-01-31 12:23:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 12:23:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-31 12:23:23,762 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-01-31 12:23:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:23:23,762 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-31 12:23:23,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 12:23:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-31 12:23:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 12:23:23,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:23:23,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:23:23,781 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 12:23:23,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:23:23,976 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:23:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:23:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1998589396, now seen corresponding path program 2 times [2022-01-31 12:23:23,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:23:23,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272717879] [2022-01-31 12:23:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:23:23,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:23:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:24,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:23:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:24,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:23:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:24,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:23:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 12:23:24,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:23:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272717879] [2022-01-31 12:23:24,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272717879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:23:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047816283] [2022-01-31 12:23:24,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:23:24,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:23:24,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:23:24,110 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 12:23:24,111 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 12:23:24,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:23:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:23:24,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 12:23:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:23:24,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 12:23:24,393 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 12:23:24,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-01-31 12:23:24,710 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 12:23:24,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-01-31 12:23:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 12:23:24,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:23:28,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047816283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:23:28,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:23:28,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-01-31 12:23:28,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944954545] [2022-01-31 12:23:28,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:23:28,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 12:23:28,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:23:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 12:23:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-01-31 12:23:28,491 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 12:23:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:23:29,039 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-01-31 12:23:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 12:23:29,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-01-31 12:23:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:23:29,041 INFO L225 Difference]: With dead ends: 55 [2022-01-31 12:23:29,041 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 12:23:29,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=296, Invalid=1682, Unknown=2, NotChecked=0, Total=1980 [2022-01-31 12:23:29,043 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:23:29,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 216 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-01-31 12:23:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 12:23:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-01-31 12:23:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 12:23:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-01-31 12:23:29,048 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-01-31 12:23:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:23:29,048 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-01-31 12:23:29,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 12:23:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-01-31 12:23:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 12:23:29,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:23:29,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:23:29,080 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 12:23:29,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 12:23:29,261 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:23:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:23:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash 483843889, now seen corresponding path program 1 times [2022-01-31 12:23:29,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:23:29,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206948555] [2022-01-31 12:23:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:23:29,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:23:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:29,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:23:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:29,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:23:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:29,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:23:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:29,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 12:23:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:29,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 12:23:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 12:23:29,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:23:29,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206948555] [2022-01-31 12:23:29,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206948555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:23:29,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679044366] [2022-01-31 12:23:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:23:29,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:23:29,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:23:29,377 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 12:23:29,391 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 12:23:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:29,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 12:23:29,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:23:29,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-31 12:23:29,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-01-31 12:23:29,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 12:23:29,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2022-01-31 12:23:30,148 INFO L353 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-01-31 12:23:30,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-01-31 12:23:31,184 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-31 12:23:31,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-01-31 12:23:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 12:23:31,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:23:35,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679044366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:23:35,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:23:35,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 21 [2022-01-31 12:23:35,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168997510] [2022-01-31 12:23:35,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:23:35,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 12:23:35,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:23:35,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 12:23:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=599, Unknown=2, NotChecked=0, Total=702 [2022-01-31 12:23:35,704 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 12:23:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:23:36,094 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-01-31 12:23:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 12:23:36,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-01-31 12:23:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:23:36,096 INFO L225 Difference]: With dead ends: 66 [2022-01-31 12:23:36,096 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 12:23:36,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=205, Invalid=1353, Unknown=2, NotChecked=0, Total=1560 [2022-01-31 12:23:36,097 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:23:36,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 150 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 169 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-01-31 12:23:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 12:23:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-01-31 12:23:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 12:23:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-31 12:23:36,102 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-01-31 12:23:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:23:36,102 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-31 12:23:36,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 12:23:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-31 12:23:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 12:23:36,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:23:36,104 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:23:36,145 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 12:23:36,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:23:36,323 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:23:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:23:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash -926913650, now seen corresponding path program 2 times [2022-01-31 12:23:36,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:23:36,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240203213] [2022-01-31 12:23:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:23:36,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:23:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:23:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:36,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:23:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:23:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:36,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 12:23:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:36,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 12:23:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 12:23:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 12:23:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 12:23:36,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:23:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240203213] [2022-01-31 12:23:36,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240203213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:23:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556734199] [2022-01-31 12:23:36,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:23:36,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:23:36,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:23:36,492 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 12:23:36,493 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 12:23:36,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:23:36,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:23:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 12:23:36,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:23:36,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-31 12:23:36,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-01-31 12:23:36,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 12:23:36,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2022-01-31 12:23:38,799 INFO L353 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-01-31 12:23:38,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-01-31 12:23:40,720 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-31 12:23:40,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-01-31 12:23:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 12:23:40,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:23:47,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556734199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:23:47,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:23:47,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20] total 23 [2022-01-31 12:23:47,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054229204] [2022-01-31 12:23:47,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:23:47,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 12:23:47,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:23:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 12:23:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=748, Unknown=7, NotChecked=0, Total=870 [2022-01-31 12:23:47,504 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 12:23:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:23:50,450 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-01-31 12:23:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 12:23:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-01-31 12:23:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:23:50,451 INFO L225 Difference]: With dead ends: 86 [2022-01-31 12:23:50,452 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 12:23:50,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=238, Invalid=1734, Unknown=8, NotChecked=0, Total=1980 [2022-01-31 12:23:50,453 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:23:50,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 190 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 303 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-01-31 12:23:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 12:23:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-01-31 12:23:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 12:23:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-01-31 12:23:50,458 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-01-31 12:23:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:23:50,458 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-01-31 12:23:50,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 12:23:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-01-31 12:23:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 12:23:50,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:23:50,459 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:23:50,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 12:23:50,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:23:50,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:23:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:23:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash -635325717, now seen corresponding path program 3 times [2022-01-31 12:23:50,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:23:50,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256141370] [2022-01-31 12:23:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:23:50,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:23:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:23:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:23:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:23:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 12:23:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 12:23:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 12:23:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 12:23:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 12:23:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 12:23:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:23:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-31 12:23:50,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:23:50,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256141370] [2022-01-31 12:23:50,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256141370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:23:50,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596235577] [2022-01-31 12:23:50,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:23:50,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:23:50,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:23:50,860 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 12:23:50,862 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 12:23:51,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 12:23:51,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:23:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-31 12:23:51,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:23:51,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-31 12:23:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:23:51,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-01-31 12:23:51,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 12:23:51,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 30 [2022-01-31 12:23:51,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 95 [2022-01-31 12:23:51,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:23:51,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:23:51,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:23:51,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 104 [2022-01-31 12:23:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:23:51,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 47 [2022-01-31 12:23:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-31 12:23:52,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:23:54,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-01-31 12:23:54,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:23:54,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 12:23:54,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2022-01-31 12:23:54,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-01-31 12:23:54,834 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 12:23:54,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-31 12:23:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 12:23:55,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596235577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:23:55,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:23:55,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-01-31 12:23:55,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420844594] [2022-01-31 12:23:55,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:23:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 12:23:55,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:23:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 12:23:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 12:23:55,184 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-01-31 12:24:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:24:00,470 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2022-01-31 12:24:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 12:24:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-01-31 12:24:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:24:00,473 INFO L225 Difference]: With dead ends: 192 [2022-01-31 12:24:00,473 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 12:24:00,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1059, Invalid=6081, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 12:24:00,475 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 371 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:24:00,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 132 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1811 Invalid, 0 Unknown, 307 Unchecked, 2.1s Time] [2022-01-31 12:24:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 12:24:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-01-31 12:24:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.086021505376344) internal successors, (101), 95 states have internal predecessors, (101), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 12:24:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-01-31 12:24:00,497 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-01-31 12:24:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:24:00,497 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-01-31 12:24:00,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-01-31 12:24:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-01-31 12:24:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 12:24:00,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:24:00,520 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:24:00,526 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 12:24:00,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:24:00,724 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:24:00,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:24:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash 994030920, now seen corresponding path program 4 times [2022-01-31 12:24:00,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:24:00,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136322338] [2022-01-31 12:24:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:24:00,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:24:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:24:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:24:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:24:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 12:24:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 12:24:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 12:24:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 12:24:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 12:24:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 12:24:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 12:24:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 12:24:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-31 12:24:00,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:24:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136322338] [2022-01-31 12:24:00,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136322338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:24:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055189300] [2022-01-31 12:24:00,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 12:24:00,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:24:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:24:00,880 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 12:24:00,908 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 12:24:01,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 12:24:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:24:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 12:24:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:24:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 12:24:01,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:24:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-31 12:24:01,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055189300] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:24:01,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:24:01,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-31 12:24:01,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038650417] [2022-01-31 12:24:01,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:24:01,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 12:24:01,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:24:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 12:24:01,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-01-31 12:24:01,915 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 12:24:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:24:03,058 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2022-01-31 12:24:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 12:24:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-01-31 12:24:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:24:03,060 INFO L225 Difference]: With dead ends: 159 [2022-01-31 12:24:03,060 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 12:24:03,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-01-31 12:24:03,061 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 12:24:03,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 79 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 12:24:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 12:24:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-01-31 12:24:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 12:24:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-01-31 12:24:03,069 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-01-31 12:24:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:24:03,069 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-01-31 12:24:03,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 12:24:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-01-31 12:24:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 12:24:03,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:24:03,070 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:24:03,095 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 12:24:03,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:24:03,271 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:24:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:24:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1349749463, now seen corresponding path program 5 times [2022-01-31 12:24:03,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:24:03,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832470020] [2022-01-31 12:24:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:24:03,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:24:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:24:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:24:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:24:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 12:24:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 12:24:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 12:24:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 12:24:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 12:24:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 12:24:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 12:24:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 12:24:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 12:24:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 12:24:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 12:24:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 12:24:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 12:24:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-31 12:24:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-01-31 12:24:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:24:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-01-31 12:24:03,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:24:03,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832470020] [2022-01-31 12:24:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832470020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:24:03,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329534519] [2022-01-31 12:24:03,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 12:24:03,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:24:03,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:24:03,689 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 12:24:03,699 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 12:24:45,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-01-31 12:24:45,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:24:45,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 12:24:45,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:24:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-01-31 12:24:46,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:24:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-01-31 12:24:46,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329534519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:24:46,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:24:46,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 12:24:46,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355139796] [2022-01-31 12:24:46,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:24:46,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 12:24:46,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:24:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 12:24:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 12:24:46,972 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-01-31 12:25:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:25:06,977 INFO L93 Difference]: Finished difference Result 287 states and 339 transitions. [2022-01-31 12:25:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 12:25:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-01-31 12:25:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:25:06,979 INFO L225 Difference]: With dead ends: 287 [2022-01-31 12:25:06,979 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 12:25:06,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 12:25:06,980 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 705 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:25:06,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 148 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 12:25:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 12:25:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-01-31 12:25:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 12:25:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-01-31 12:25:06,995 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-01-31 12:25:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:25:06,996 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-01-31 12:25:06,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-01-31 12:25:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-01-31 12:25:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 12:25:06,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:25:06,998 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:25:07,014 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 12:25:07,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:25:07,214 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:25:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:25:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1018698857, now seen corresponding path program 6 times [2022-01-31 12:25:07,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:25:07,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425705484] [2022-01-31 12:25:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:25:07,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:25:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:25:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:25:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:25:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 12:25:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 12:25:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 12:25:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 12:25:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 12:25:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 12:25:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 12:25:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 12:25:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 12:25:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 12:25:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 12:25:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 12:25:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 12:25:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 12:25:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-31 12:25:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-01-31 12:25:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-31 12:25:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-01-31 12:25:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-31 12:25:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-01-31 12:25:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-31 12:25:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-01-31 12:25:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-01-31 12:25:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-31 12:25:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-01-31 12:25:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-01-31 12:25:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-01-31 12:25:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-01-31 12:25:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-01-31 12:25:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-01-31 12:25:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-01-31 12:25:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-01-31 12:25:07,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:25:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425705484] [2022-01-31 12:25:07,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425705484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:25:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134581098] [2022-01-31 12:25:07,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 12:25:07,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:25:07,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:25:07,968 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 12:25:07,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process