/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:58:13,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:58:13,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:58:13,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:58:13,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:58:13,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:58:13,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:58:13,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:58:13,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:58:13,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:58:13,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:58:13,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:58:13,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:58:13,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:58:13,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:58:13,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:58:13,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:58:13,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:58:13,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:58:13,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:58:13,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:58:13,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:58:13,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:58:13,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:58:13,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:58:13,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:58:13,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:58:13,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:58:13,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:58:13,517 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:58:13,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:58:13,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:58:13,519 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:58:13,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:58:13,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:58:13,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:58:13,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:58:13,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:58:13,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:58:13,520 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:58:13,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:58:13,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:58:13,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:58:13,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:58:13,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:58:13,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:58:13,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:58:13,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:58:13,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:58:13,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:58:13,522 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:58:13,522 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:58:13,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:58:13,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:58:13,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:58:13,738 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:58:13,739 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:58:13,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2022-01-31 09:58:13,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daef50867/50b26f933b184777a42c7e352f190b67/FLAGbed1b2ae0 [2022-01-31 09:58:14,173 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:58:14,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2022-01-31 09:58:14,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daef50867/50b26f933b184777a42c7e352f190b67/FLAGbed1b2ae0 [2022-01-31 09:58:14,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daef50867/50b26f933b184777a42c7e352f190b67 [2022-01-31 09:58:14,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:58:14,195 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:58:14,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:58:14,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:58:14,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:58:14,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656ae461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14, skipping insertion in model container [2022-01-31 09:58:14,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:58:14,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:58:14,325 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c[406,419] [2022-01-31 09:58:14,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:58:14,338 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:58:14,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c[406,419] [2022-01-31 09:58:14,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:58:14,356 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:58:14,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14 WrapperNode [2022-01-31 09:58:14,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:58:14,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:58:14,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:58:14,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:58:14,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:58:14,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:58:14,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:58:14,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:58:14,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:58:14,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:14,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 09:58:14,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 09:58:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:58:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:58:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:58:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:58:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:58:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:58:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:58:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:58:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:58:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:58:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:58:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:58:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 09:58:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 09:58:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:58:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 09:58:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:58:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:58:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:58:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:58:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:58:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:58:14,507 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:58:14,509 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:58:14,650 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:58:14,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:58:14,654 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 09:58:14,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:58:14 BoogieIcfgContainer [2022-01-31 09:58:14,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:58:14,656 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:58:14,656 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:58:14,657 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:58:14,659 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:58:14" (1/1) ... [2022-01-31 09:58:14,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:58:14 BasicIcfg [2022-01-31 09:58:14,676 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:58:14,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:58:14,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:58:14,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:58:14,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:58:14" (1/4) ... [2022-01-31 09:58:14,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5ff2a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:58:14, skipping insertion in model container [2022-01-31 09:58:14,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:58:14" (2/4) ... [2022-01-31 09:58:14,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5ff2a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:58:14, skipping insertion in model container [2022-01-31 09:58:14,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:58:14" (3/4) ... [2022-01-31 09:58:14,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5ff2a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:58:14, skipping insertion in model container [2022-01-31 09:58:14,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:58:14" (4/4) ... [2022-01-31 09:58:14,683 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.cJordan [2022-01-31 09:58:14,686 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:58:14,686 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:58:14,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:58:14,733 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:58:14,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:58:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:58:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 09:58:14,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:14,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:14,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1680681099, now seen corresponding path program 1 times [2022-01-31 09:58:14,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:14,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404708825] [2022-01-31 09:58:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:14,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:14,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:14,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404708825] [2022-01-31 09:58:14,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404708825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:58:14,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:58:14,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:58:14,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731032480] [2022-01-31 09:58:14,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:58:14,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:58:14,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:14,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:58:14,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:58:14,969 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 09:58:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:15,012 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-31 09:58:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:58:15,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-01-31 09:58:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:15,018 INFO L225 Difference]: With dead ends: 27 [2022-01-31 09:58:15,018 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 09:58:15,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:58:15,021 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:15,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:58:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 09:58:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 09:58:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 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 09:58:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 09:58:15,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2022-01-31 09:58:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:15,041 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 09:58:15,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 09:58:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 09:58:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 09:58:15,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:15,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:15,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:58:15,042 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash 761653838, now seen corresponding path program 1 times [2022-01-31 09:58:15,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:15,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995204451] [2022-01-31 09:58:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:15,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:15,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:15,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995204451] [2022-01-31 09:58:15,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995204451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:58:15,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:58:15,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:58:15,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103499327] [2022-01-31 09:58:15,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:58:15,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:58:15,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:58:15,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:58:15,107 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 09:58:15,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:15,157 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-01-31 09:58:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:58:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2022-01-31 09:58:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:15,158 INFO L225 Difference]: With dead ends: 22 [2022-01-31 09:58:15,158 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 09:58:15,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:58:15,159 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:15,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:58:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 09:58:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-31 09:58:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 09:58:15,162 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-01-31 09:58:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:15,162 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 09:58:15,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 09:58:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 09:58:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 09:58:15,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:15,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:15,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:58:15,163 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:15,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1717272651, now seen corresponding path program 1 times [2022-01-31 09:58:15,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:15,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855337616] [2022-01-31 09:58:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:15,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:58:15,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:15,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855337616] [2022-01-31 09:58:15,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855337616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:58:15,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:58:15,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:58:15,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763856737] [2022-01-31 09:58:15,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:58:15,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:58:15,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:58:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:58:15,249 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 09:58:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:15,323 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 09:58:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:58:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2022-01-31 09:58:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:15,324 INFO L225 Difference]: With dead ends: 26 [2022-01-31 09:58:15,324 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 09:58:15,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:58:15,325 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:15,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:58:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 09:58:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-01-31 09:58:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-31 09:58:15,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2022-01-31 09:58:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:15,328 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-31 09:58:15,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 09:58:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-31 09:58:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:58:15,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:15,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:15,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:58:15,329 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:15,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash -891206105, now seen corresponding path program 1 times [2022-01-31 09:58:15,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:15,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638201174] [2022-01-31 09:58:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:15,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 09:58:15,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638201174] [2022-01-31 09:58:15,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638201174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277585710] [2022-01-31 09:58:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:15,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:15,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:15,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:58:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:58:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 09:58:15,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 09:58:15,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277585710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:15,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:15,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:58:15,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901350213] [2022-01-31 09:58:15,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:15,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:58:15,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:58:15,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:58:15,661 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:15,709 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 09:58:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:58:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 09:58:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:15,715 INFO L225 Difference]: With dead ends: 26 [2022-01-31 09:58:15,715 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 09:58:15,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:58:15,716 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:15,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:58:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 09:58:15,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-31 09:58:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 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 09:58:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-31 09:58:15,719 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2022-01-31 09:58:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:15,720 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-31 09:58:15,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-31 09:58:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 09:58:15,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:15,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:15,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:15,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:15,929 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1813092, now seen corresponding path program 2 times [2022-01-31 09:58:15,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:15,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945718481] [2022-01-31 09:58:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:15,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:58:15,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945718481] [2022-01-31 09:58:15,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945718481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276302974] [2022-01-31 09:58:15,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:58:15,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:15,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:16,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:58:16,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:58:16,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:16,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:58:16,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:58:16,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:58:16,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276302974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:16,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:16,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-31 09:58:16,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614029531] [2022-01-31 09:58:16,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:16,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 09:58:16,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:16,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 09:58:16,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:58:16,186 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:16,246 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-01-31 09:58:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 09:58:16,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 09:58:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:16,247 INFO L225 Difference]: With dead ends: 32 [2022-01-31 09:58:16,247 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 09:58:16,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:58:16,249 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:16,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:58:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 09:58:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-01-31 09:58:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 09:58:16,251 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-01-31 09:58:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:16,252 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 09:58:16,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 09:58:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:58:16,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:16,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:16,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:16,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:16,472 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash -189787200, now seen corresponding path program 3 times [2022-01-31 09:58:16,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:16,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147447623] [2022-01-31 09:58:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:16,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:16,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:16,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147447623] [2022-01-31 09:58:16,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147447623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114756018] [2022-01-31 09:58:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:58:16,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:16,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:16,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:16,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:58:16,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:58:16,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:16,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 09:58:16,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:17,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:58:17,567 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 17 treesize of output 18 [2022-01-31 09:58:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:17,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:18,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:58:18,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2022-01-31 09:58:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:19,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114756018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:19,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:19,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 50 [2022-01-31 09:58:19,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895543286] [2022-01-31 09:58:19,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:19,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:58:19,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:58:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:58:19,364 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:20,505 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-01-31 09:58:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 09:58:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 09:58:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:20,508 INFO L225 Difference]: With dead ends: 56 [2022-01-31 09:58:20,508 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 09:58:20,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=612, Invalid=5240, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 09:58:20,511 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:20,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 153 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 392 Invalid, 0 Unknown, 218 Unchecked, 0.2s Time] [2022-01-31 09:58:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 09:58:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 34. [2022-01-31 09:58:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 3 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 09:58:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-01-31 09:58:20,517 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2022-01-31 09:58:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:20,518 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-01-31 09:58:20,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-01-31 09:58:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 09:58:20,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:20,519 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:20,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:20,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:20,723 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1084522786, now seen corresponding path program 4 times [2022-01-31 09:58:20,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:20,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654675099] [2022-01-31 09:58:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:20,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:20,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:58:20,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654675099] [2022-01-31 09:58:20,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654675099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168035512] [2022-01-31 09:58:20,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:58:20,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:20,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:20,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:20,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:58:20,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:58:20,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:58:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:58:20,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:58:20,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168035512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:20,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:20,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 09:58:20,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240792236] [2022-01-31 09:58:20,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:20,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:58:20,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:58:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:58:20,991 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:21,110 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-01-31 09:58:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:58:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 09:58:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:21,112 INFO L225 Difference]: With dead ends: 56 [2022-01-31 09:58:21,112 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 09:58:21,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:58:21,113 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:21,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 27 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:58:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 09:58:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-01-31 09:58:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 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 09:58:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-01-31 09:58:21,123 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2022-01-31 09:58:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:21,123 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-01-31 09:58:21,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-01-31 09:58:21,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:58:21,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:21,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:21,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:21,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:21,325 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash -379573573, now seen corresponding path program 5 times [2022-01-31 09:58:21,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:21,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778313299] [2022-01-31 09:58:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:21,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:21,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:58:21,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778313299] [2022-01-31 09:58:21,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778313299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421914720] [2022-01-31 09:58:21,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:58:21,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:21,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:21,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:21,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:58:21,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 09:58:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:21,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:58:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:58:21,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:58:21,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421914720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:21,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:21,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 09:58:21,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988951490] [2022-01-31 09:58:21,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:21,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:58:21,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:58:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:58:21,568 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:21,677 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-01-31 09:58:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 09:58:21,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 09:58:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:21,678 INFO L225 Difference]: With dead ends: 37 [2022-01-31 09:58:21,678 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 09:58:21,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 09:58:21,679 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:21,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 47 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:58:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 09:58:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-01-31 09:58:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-31 09:58:21,681 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2022-01-31 09:58:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:21,681 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-31 09:58:21,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-31 09:58:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 09:58:21,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:21,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:21,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:21,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:21,895 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1214366489, now seen corresponding path program 6 times [2022-01-31 09:58:21,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:21,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497719260] [2022-01-31 09:58:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:21,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:22,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:22,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:22,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497719260] [2022-01-31 09:58:22,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497719260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:22,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879027682] [2022-01-31 09:58:22,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:58:22,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:22,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:22,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:58:22,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 09:58:22,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:22,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 09:58:22,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:22,631 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 09:58:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:23,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:23,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:23,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:58:23,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2022-01-31 09:58:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:23,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:25,152 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 142 treesize of output 126 [2022-01-31 09:58:25,181 INFO L353 Elim1Store]: treesize reduction 94, result has 8.7 percent of original size [2022-01-31 09:58:25,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1454 treesize of output 1047 [2022-01-31 09:58:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:58:26,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879027682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:26,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:26,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 63 [2022-01-31 09:58:26,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298430891] [2022-01-31 09:58:26,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:26,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 09:58:26,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:26,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 09:58:26,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=3470, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 09:58:26,031 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 60 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:48,098 WARN L228 SmtUtils]: Spent 14.82s on a formula simplification. DAG size of input: 95 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 09:58:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:58,123 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2022-01-31 09:58:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 09:58:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 60 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 09:58:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:58,124 INFO L225 Difference]: With dead ends: 86 [2022-01-31 09:58:58,124 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 09:58:58,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=950, Invalid=7787, Unknown=5, NotChecked=0, Total=8742 [2022-01-31 09:58:58,127 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:58,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 144 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 322 Invalid, 0 Unknown, 474 Unchecked, 0.2s Time] [2022-01-31 09:58:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 09:58:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2022-01-31 09:58:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 3 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 09:58:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2022-01-31 09:58:58,130 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 34 [2022-01-31 09:58:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:58,130 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2022-01-31 09:58:58,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 60 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2022-01-31 09:58:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 09:58:58,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:58,131 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:58,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:58,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:58,348 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -312558601, now seen corresponding path program 7 times [2022-01-31 09:58:58,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908972277] [2022-01-31 09:58:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:58,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:58:58,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:58,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908972277] [2022-01-31 09:58:58,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908972277] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:58,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71667409] [2022-01-31 09:58:58,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:58:58,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:58,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:58,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:58:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:58,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:58:58,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:58:58,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:58:58,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71667409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:58,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:58,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:58:58,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130645469] [2022-01-31 09:58:58,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:58,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:58:58,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:58,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:58:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:58:58,690 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:58,830 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-01-31 09:58:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:58:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 09:58:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:58,832 INFO L225 Difference]: With dead ends: 88 [2022-01-31 09:58:58,832 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 09:58:58,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-31 09:58:58,833 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:58,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 29 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:58:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 09:58:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-01-31 09:58:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 3 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 09:58:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-01-31 09:58:58,837 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 36 [2022-01-31 09:58:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:58,837 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-01-31 09:58:58,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-01-31 09:58:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 09:58:58,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:58,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:58,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:59,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:59,048 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:59,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash 174038548, now seen corresponding path program 8 times [2022-01-31 09:58:59,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:59,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629502199] [2022-01-31 09:58:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:59,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:59,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:58:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:58:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:58:59,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:58:59,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629502199] [2022-01-31 09:58:59,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629502199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:58:59,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279048503] [2022-01-31 09:58:59,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:58:59,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:58:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:58:59,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:58:59,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:58:59,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:58:59,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:58:59,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:58:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:58:59,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:58:59,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279048503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:58:59,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:58:59,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:58:59,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715331414] [2022-01-31 09:58:59,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:58:59,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:58:59,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:58:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:58:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:58:59,402 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:58:59,587 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-01-31 09:58:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:58:59,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 09:58:59,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:58:59,588 INFO L225 Difference]: With dead ends: 57 [2022-01-31 09:58:59,588 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 09:58:59,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:58:59,588 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:58:59,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 61 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:58:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 09:58:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2022-01-31 09:58:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 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 09:58:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-01-31 09:58:59,591 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2022-01-31 09:58:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:58:59,591 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-01-31 09:58:59,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:58:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-01-31 09:58:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 09:58:59,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:58:59,592 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:58:59,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:59,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 09:58:59,796 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:58:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:58:59,796 INFO L85 PathProgramCache]: Analyzing trace with hash 659670066, now seen corresponding path program 9 times [2022-01-31 09:58:59,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:58:59,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554488240] [2022-01-31 09:58:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:58:59,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:58:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:00,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:59:00,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:00,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554488240] [2022-01-31 09:59:00,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554488240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:00,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024530225] [2022-01-31 09:59:00,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:59:00,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:00,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:00,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:59:01,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 09:59:01,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:01,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 09:59:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:01,081 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 09:59:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:02,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:59:02,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:02,480 INFO L353 Elim1Store]: treesize reduction 16, result has 72.4 percent of original size [2022-01-31 09:59:02,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 55 [2022-01-31 09:59:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:59:02,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:59:05,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024530225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:05,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:05,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 22] total 72 [2022-01-31 09:59:05,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264187629] [2022-01-31 09:59:05,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:05,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 09:59:05,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:05,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 09:59:05,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=4745, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 09:59:05,636 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 72 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 69 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:08,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:08,031 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-01-31 09:59:08,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 09:59:08,032 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 69 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 09:59:08,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:08,033 INFO L225 Difference]: With dead ends: 78 [2022-01-31 09:59:08,033 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 09:59:08,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=814, Invalid=9898, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 09:59:08,035 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:08,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 174 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 219 Invalid, 0 Unknown, 294 Unchecked, 0.1s Time] [2022-01-31 09:59:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 09:59:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-01-31 09:59:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 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 09:59:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-01-31 09:59:08,038 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2022-01-31 09:59:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:08,038 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-01-31 09:59:08,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 69 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-01-31 09:59:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 09:59:08,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:08,039 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:08,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 09:59:08,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:08,244 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:08,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash -799876400, now seen corresponding path program 10 times [2022-01-31 09:59:08,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:08,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378360717] [2022-01-31 09:59:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:08,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:08,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:59:08,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:08,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378360717] [2022-01-31 09:59:08,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378360717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:08,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015747369] [2022-01-31 09:59:08,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:59:08,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:08,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:08,340 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:08,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:59:08,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:59:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:59:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:59:08,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:59:08,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015747369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:08,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:08,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:59:08,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061943379] [2022-01-31 09:59:08,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:08,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:59:08,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:59:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:59:08,592 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:08,748 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2022-01-31 09:59:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:59:08,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 09:59:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:08,749 INFO L225 Difference]: With dead ends: 76 [2022-01-31 09:59:08,749 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:59:08,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:59:08,749 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:08,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 35 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:59:08,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:59:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-01-31 09:59:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 3 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 09:59:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-01-31 09:59:08,752 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2022-01-31 09:59:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:08,752 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-01-31 09:59:08,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-01-31 09:59:08,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 09:59:08,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:08,752 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:08,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:08,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 09:59:08,964 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1328921811, now seen corresponding path program 11 times [2022-01-31 09:59:08,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:08,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197119358] [2022-01-31 09:59:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:08,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:09,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:59:09,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:09,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197119358] [2022-01-31 09:59:09,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197119358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:09,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365370144] [2022-01-31 09:59:09,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:59:09,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:09,063 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:09,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:59:09,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 09:59:09,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:59:09,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:59:09,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:59:09,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365370144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:09,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:09,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:59:09,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405113793] [2022-01-31 09:59:09,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:09,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:59:09,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:09,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:59:09,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:59:09,330 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:09,528 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-01-31 09:59:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 09:59:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 09:59:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:09,529 INFO L225 Difference]: With dead ends: 49 [2022-01-31 09:59:09,529 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 09:59:09,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2022-01-31 09:59:09,530 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:09,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 53 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:59:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 09:59:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-01-31 09:59:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 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 09:59:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-01-31 09:59:09,532 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2022-01-31 09:59:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:09,532 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-01-31 09:59:09,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-01-31 09:59:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 09:59:09,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:09,533 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:09,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:09,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 09:59:09,737 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:09,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash -576223477, now seen corresponding path program 12 times [2022-01-31 09:59:09,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:09,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104896704] [2022-01-31 09:59:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:09,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:11,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:59:11,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:11,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104896704] [2022-01-31 09:59:11,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104896704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:11,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380915361] [2022-01-31 09:59:11,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:59:11,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:11,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:11,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:11,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:59:11,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 09:59:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 09:59:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:11,244 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 09:59:12,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:59:12,486 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 17 treesize of output 18 [2022-01-31 09:59:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:59:12,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:59:16,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380915361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:16,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:16,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31, 26] total 81 [2022-01-31 09:59:16,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688136063] [2022-01-31 09:59:16,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:16,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 09:59:16,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 09:59:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=6128, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 09:59:16,975 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 81 states, 81 states have (on average 1.308641975308642) internal successors, (106), 78 states have internal predecessors, (106), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:19,879 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-01-31 09:59:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 09:59:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.308641975308642) internal successors, (106), 78 states have internal predecessors, (106), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 09:59:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:19,880 INFO L225 Difference]: With dead ends: 66 [2022-01-31 09:59:19,880 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 09:59:19,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=772, Invalid=12800, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 09:59:19,883 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:19,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 262 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 730 Invalid, 0 Unknown, 611 Unchecked, 0.3s Time] [2022-01-31 09:59:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 09:59:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2022-01-31 09:59:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 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 09:59:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-01-31 09:59:19,885 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 46 [2022-01-31 09:59:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:19,886 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-01-31 09:59:19,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.308641975308642) internal successors, (106), 78 states have internal predecessors, (106), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-01-31 09:59:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 09:59:19,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:19,886 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:19,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 09:59:20,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 09:59:20,100 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:20,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1212369769, now seen corresponding path program 13 times [2022-01-31 09:59:20,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:20,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126491542] [2022-01-31 09:59:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:20,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:59:20,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:20,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126491542] [2022-01-31 09:59:20,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126491542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:20,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038167690] [2022-01-31 09:59:20,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:59:20,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:20,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:20,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:59:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:20,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:59:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:59:20,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:59:20,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038167690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:20,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:20,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 09:59:20,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453747570] [2022-01-31 09:59:20,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:20,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:59:20,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:59:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:59:20,489 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:20,680 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2022-01-31 09:59:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:59:20,680 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 09:59:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:20,681 INFO L225 Difference]: With dead ends: 86 [2022-01-31 09:59:20,681 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 09:59:20,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2022-01-31 09:59:20,682 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:20,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 39 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:59:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 09:59:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2022-01-31 09:59:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 3 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 09:59:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-01-31 09:59:20,684 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2022-01-31 09:59:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:20,684 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-01-31 09:59:20,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-01-31 09:59:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 09:59:20,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:20,684 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:20,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:20,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 09:59:20,896 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1062237690, now seen corresponding path program 14 times [2022-01-31 09:59:20,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:20,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966345602] [2022-01-31 09:59:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:20,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:21,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:59:21,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966345602] [2022-01-31 09:59:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966345602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061873304] [2022-01-31 09:59:21,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:59:21,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:21,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:21,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 09:59:21,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:59:21,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:59:21,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:59:21,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:59:21,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061873304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:21,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:21,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 09:59:21,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701252499] [2022-01-31 09:59:21,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:59:21,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:59:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:59:21,344 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:21,592 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-01-31 09:59:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 09:59:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 09:59:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:21,593 INFO L225 Difference]: With dead ends: 55 [2022-01-31 09:59:21,593 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:59:21,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:59:21,594 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:21,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 49 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:59:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:59:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-01-31 09:59:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 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 09:59:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-01-31 09:59:21,596 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2022-01-31 09:59:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:21,596 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-01-31 09:59:21,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-01-31 09:59:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 09:59:21,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:21,597 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:21,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:21,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:21,811 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1990820956, now seen corresponding path program 15 times [2022-01-31 09:59:21,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689330951] [2022-01-31 09:59:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:21,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:23,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:59:23,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:23,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689330951] [2022-01-31 09:59:23,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689330951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:23,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836368496] [2022-01-31 09:59:23,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:59:23,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:23,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:23,818 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:23,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 09:59:23,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 09:59:23,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-31 09:59:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:23,966 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 09:59:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:25,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:59:25,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 99 [2022-01-31 09:59:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:59:26,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:59:32,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836368496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:32,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:32,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 34, 30] total 96 [2022-01-31 09:59:32,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459796275] [2022-01-31 09:59:32,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:32,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 09:59:32,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 09:59:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=8614, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 09:59:32,093 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 93 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:38,170 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-01-31 09:59:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 09:59:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 93 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 09:59:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:38,172 INFO L225 Difference]: With dead ends: 72 [2022-01-31 09:59:38,172 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 09:59:38,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1120, Invalid=18619, Unknown=1, NotChecked=0, Total=19740 [2022-01-31 09:59:38,173 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 905 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:38,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 272 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 999 Invalid, 0 Unknown, 905 Unchecked, 0.5s Time] [2022-01-31 09:59:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 09:59:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2022-01-31 09:59:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 3 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 09:59:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-01-31 09:59:38,190 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 52 [2022-01-31 09:59:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:38,192 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-01-31 09:59:38,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 93 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-01-31 09:59:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 09:59:38,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:38,193 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:38,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:38,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 09:59:38,396 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1006142014, now seen corresponding path program 16 times [2022-01-31 09:59:38,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:38,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628857639] [2022-01-31 09:59:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:38,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:38,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:59:38,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:38,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628857639] [2022-01-31 09:59:38,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628857639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:38,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479676896] [2022-01-31 09:59:38,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:59:38,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:38,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:38,520 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:38,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 09:59:38,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:59:38,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:38,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:59:38,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:59:38,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:59:38,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479676896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:38,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:38,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 09:59:38,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84447175] [2022-01-31 09:59:38,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:38,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:59:38,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:59:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:59:38,844 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:39,038 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-01-31 09:59:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 09:59:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 09:59:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:39,039 INFO L225 Difference]: With dead ends: 96 [2022-01-31 09:59:39,039 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 09:59:39,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 09:59:39,040 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:39,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 41 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:59:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 09:59:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-01-31 09:59:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 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 09:59:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-01-31 09:59:39,042 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2022-01-31 09:59:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:39,042 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-01-31 09:59:39,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-01-31 09:59:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:59:39,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:39,043 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:39,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:39,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:39,255 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1508565663, now seen corresponding path program 17 times [2022-01-31 09:59:39,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:39,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245858542] [2022-01-31 09:59:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:39,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:39,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:59:39,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:39,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245858542] [2022-01-31 09:59:39,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245858542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:39,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283488912] [2022-01-31 09:59:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:59:39,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:39,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:39,377 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:39,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 09:59:39,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 09:59:39,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:39,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:59:39,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:59:39,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:59:39,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283488912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:39,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:39,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 09:59:39,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993473801] [2022-01-31 09:59:39,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:39,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:59:39,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:39,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:59:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:59:39,757 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:40,035 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-01-31 09:59:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 09:59:40,035 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 09:59:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:40,036 INFO L225 Difference]: With dead ends: 61 [2022-01-31 09:59:40,036 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 09:59:40,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 09:59:40,036 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:40,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 51 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:59:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 09:59:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-01-31 09:59:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 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 09:59:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-01-31 09:59:40,038 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2022-01-31 09:59:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:40,039 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-01-31 09:59:40,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-01-31 09:59:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 09:59:40,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:40,039 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:40,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:40,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:40,252 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1054993923, now seen corresponding path program 18 times [2022-01-31 09:59:40,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:40,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461034618] [2022-01-31 09:59:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:40,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:42,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 9 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:59:42,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:42,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461034618] [2022-01-31 09:59:42,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461034618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:42,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226574486] [2022-01-31 09:59:42,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:59:42,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:42,545 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:42,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 09:59:42,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 09:59:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:42,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 80 conjunts are in the unsatisfiable core [2022-01-31 09:59:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:45,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:59:45,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 485 [2022-01-31 09:59:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 11 proven. 111 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:59:51,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:58,266 INFO L353 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2022-01-31 09:59:58,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 268 treesize of output 351 [2022-01-31 10:00:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 10:00:18,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226574486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:18,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:18,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 37, 34] total 109 [2022-01-31 10:00:18,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143924602] [2022-01-31 10:00:18,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:18,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 10:00:18,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 10:00:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=11130, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 10:00:18,088 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 109 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 106 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:25,663 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-01-31 10:00:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 10:00:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 106 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 10:00:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:25,664 INFO L225 Difference]: With dead ends: 81 [2022-01-31 10:00:25,664 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 10:00:25,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5021 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=1454, Invalid=23668, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 10:00:25,666 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:25,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 240 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1249 Invalid, 0 Unknown, 739 Unchecked, 0.7s Time] [2022-01-31 10:00:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 10:00:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-01-31 10:00:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 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 10:00:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-01-31 10:00:25,669 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2022-01-31 10:00:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:25,669 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-01-31 10:00:25,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 106 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-01-31 10:00:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 10:00:25,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:25,673 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:25,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 10:00:25,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:25,879 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash 675471835, now seen corresponding path program 19 times [2022-01-31 10:00:25,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:25,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601136941] [2022-01-31 10:00:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:25,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:26,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:00:26,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:26,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601136941] [2022-01-31 10:00:26,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601136941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:26,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077380248] [2022-01-31 10:00:26,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:00:26,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:26,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:26,029 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:26,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:00:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:26,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:00:26,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:00:26,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:00:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:00:26,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077380248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:26,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:26,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 10:00:26,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599922034] [2022-01-31 10:00:26,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:26,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:00:26,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:00:26,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:00:26,442 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:26,677 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-01-31 10:00:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:00:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 10:00:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:26,678 INFO L225 Difference]: With dead ends: 106 [2022-01-31 10:00:26,678 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 10:00:26,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 10:00:26,679 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:26,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 40 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:00:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 10:00:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-01-31 10:00:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-01-31 10:00:26,681 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2022-01-31 10:00:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:26,681 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-01-31 10:00:26,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-01-31 10:00:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 10:00:26,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:26,681 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:26,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 10:00:26,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:26,895 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash -14435080, now seen corresponding path program 20 times [2022-01-31 10:00:26,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:26,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522900482] [2022-01-31 10:00:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:26,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:27,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:00:27,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:27,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522900482] [2022-01-31 10:00:27,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522900482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:27,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429393701] [2022-01-31 10:00:27,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:00:27,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:27,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:27,062 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:27,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:00:27,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:00:27,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:00:27,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:00:27,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:00:27,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:00:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:00:27,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429393701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:27,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:27,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 10:00:27,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527061669] [2022-01-31 10:00:27,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:27,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:00:27,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:00:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:00:27,498 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:27,843 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-01-31 10:00:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:00:27,843 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 10:00:27,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:27,844 INFO L225 Difference]: With dead ends: 67 [2022-01-31 10:00:27,844 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 10:00:27,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=447, Invalid=1715, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 10:00:27,854 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 101 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:27,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 47 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:00:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 10:00:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-01-31 10:00:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 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 10:00:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-01-31 10:00:27,856 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2022-01-31 10:00:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:27,856 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-01-31 10:00:27,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-01-31 10:00:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 10:00:27,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:27,857 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:27,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 10:00:28,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 10:00:28,067 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash -74860010, now seen corresponding path program 21 times [2022-01-31 10:00:28,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:28,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210689076] [2022-01-31 10:00:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:28,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:31,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 4 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:00:31,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210689076] [2022-01-31 10:00:31,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210689076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451035988] [2022-01-31 10:00:31,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:00:31,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:31,377 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:31,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:00:31,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 10:00:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:00:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 92 conjunts are in the unsatisfiable core [2022-01-31 10:00:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:31,592 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 10:00:35,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:00:35,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:00:35,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 167 [2022-01-31 10:00:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 9 proven. 167 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:00:35,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:00:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:00:47,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451035988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:47,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:47,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 43, 38] total 124 [2022-01-31 10:00:47,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375204578] [2022-01-31 10:00:47,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:47,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 10:00:47,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 10:00:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=14541, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 10:00:47,919 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:59,442 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-01-31 10:00:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 10:00:59,442 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 10:00:59,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:59,443 INFO L225 Difference]: With dead ends: 88 [2022-01-31 10:00:59,443 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 10:00:59,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6178 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=1636, Invalid=30583, Unknown=1, NotChecked=0, Total=32220 [2022-01-31 10:00:59,444 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1125 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:59,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 308 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1543 Invalid, 0 Unknown, 1125 Unchecked, 0.9s Time] [2022-01-31 10:00:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 10:00:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2022-01-31 10:00:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 3 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 10:00:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-01-31 10:00:59,446 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 64 [2022-01-31 10:00:59,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:59,446 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-01-31 10:00:59,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-01-31 10:00:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 10:00:59,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:59,447 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:59,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:00:59,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 10:00:59,663 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1986324404, now seen corresponding path program 22 times [2022-01-31 10:00:59,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:59,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052670520] [2022-01-31 10:00:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:59,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:59,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:00:59,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052670520] [2022-01-31 10:00:59,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052670520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272969682] [2022-01-31 10:00:59,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:00:59,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:59,832 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:59,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 10:00:59,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:00:59,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:00:59,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:00:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:01:00,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:01:00,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272969682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:00,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:00,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 10:01:00,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319956335] [2022-01-31 10:01:00,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:00,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:01:00,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:01:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:01:00,279 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:00,540 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2022-01-31 10:01:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 10:01:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 10:01:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:00,541 INFO L225 Difference]: With dead ends: 116 [2022-01-31 10:01:00,541 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 10:01:00,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 10:01:00,543 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:00,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 57 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:01:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 10:01:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-01-31 10:01:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 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 10:01:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-01-31 10:01:00,545 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2022-01-31 10:01:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:00,545 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-01-31 10:01:00,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-01-31 10:01:00,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 10:01:00,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:00,545 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:00,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:00,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:00,752 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2093844753, now seen corresponding path program 23 times [2022-01-31 10:01:00,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:00,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550358628] [2022-01-31 10:01:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:00,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:00,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:01:00,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:00,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550358628] [2022-01-31 10:01:00,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550358628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:00,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905779797] [2022-01-31 10:01:00,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:01:00,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:00,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:00,924 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:00,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 10:01:01,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-31 10:01:01,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:01,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:01:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:01:01,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:01:01,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905779797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:01,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:01,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 10:01:01,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732719766] [2022-01-31 10:01:01,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:01,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:01:01,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:01:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:01:01,451 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:01,852 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2022-01-31 10:01:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 10:01:01,853 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 10:01:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:01,853 INFO L225 Difference]: With dead ends: 73 [2022-01-31 10:01:01,853 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 10:01:01,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=2107, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 10:01:01,854 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:01,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 65 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:01:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 10:01:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-01-31 10:01:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 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 10:01:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-01-31 10:01:01,856 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2022-01-31 10:01:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:01,856 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-01-31 10:01:01,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-01-31 10:01:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 10:01:01,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:01,857 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:01,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:02,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:02,071 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:02,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1242504209, now seen corresponding path program 24 times [2022-01-31 10:01:02,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:02,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303537125] [2022-01-31 10:01:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:02,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:05,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:05,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:05,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303537125] [2022-01-31 10:01:05,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303537125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:05,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367050091] [2022-01-31 10:01:05,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:01:05,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:05,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:05,962 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:05,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 10:01:06,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-31 10:01:06,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:06,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 102 conjunts are in the unsatisfiable core [2022-01-31 10:01:06,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:06,365 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 10:01:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:12,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:01:12,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2022-01-31 10:01:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 5 proven. 234 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:01:12,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:01:28,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367050091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:28,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:28,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 50, 42] total 140 [2022-01-31 10:01:28,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806465522] [2022-01-31 10:01:28,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:28,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 10:01:28,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 10:01:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=18699, Unknown=1, NotChecked=0, Total=19460 [2022-01-31 10:01:28,359 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 140 states, 140 states have (on average 1.2) internal successors, (168), 137 states have internal predecessors, (168), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:39,960 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-01-31 10:01:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 10:01:39,961 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.2) internal successors, (168), 137 states have internal predecessors, (168), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 10:01:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:39,961 INFO L225 Difference]: With dead ends: 97 [2022-01-31 10:01:39,961 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 10:01:39,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8199 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=1695, Invalid=38906, Unknown=1, NotChecked=0, Total=40602 [2022-01-31 10:01:39,963 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 4304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2010 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:39,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 363 Invalid, 4304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2160 Invalid, 0 Unknown, 2010 Unchecked, 1.3s Time] [2022-01-31 10:01:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 10:01:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2022-01-31 10:01:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 3 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 10:01:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-01-31 10:01:39,965 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 70 [2022-01-31 10:01:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-01-31 10:01:39,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.2) internal successors, (168), 137 states have internal predecessors, (168), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-01-31 10:01:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 10:01:39,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:39,966 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:39,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:40,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 10:01:40,175 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 866713421, now seen corresponding path program 25 times [2022-01-31 10:01:40,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:40,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697819016] [2022-01-31 10:01:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:40,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:40,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:01:40,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697819016] [2022-01-31 10:01:40,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697819016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:40,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300310538] [2022-01-31 10:01:40,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:01:40,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:40,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:40,380 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:40,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 10:01:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:40,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 10:01:40,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:01:40,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:01:40,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300310538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:40,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:40,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 10:01:40,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264875183] [2022-01-31 10:01:40,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:40,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:01:40,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:01:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 10:01:40,896 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:41,203 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2022-01-31 10:01:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:01:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 10:01:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:41,204 INFO L225 Difference]: With dead ends: 126 [2022-01-31 10:01:41,204 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 10:01:41,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=492, Invalid=1670, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 10:01:41,205 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:41,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 37 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:01:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 10:01:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2022-01-31 10:01:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 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 10:01:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-01-31 10:01:41,207 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2022-01-31 10:01:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:41,207 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-01-31 10:01:41,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-01-31 10:01:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 10:01:41,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:41,208 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:41,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:41,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 10:01:41,408 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:41,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1876445462, now seen corresponding path program 26 times [2022-01-31 10:01:41,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:41,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27067551] [2022-01-31 10:01:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:41,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:41,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:01:41,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:41,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27067551] [2022-01-31 10:01:41,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27067551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:41,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503389888] [2022-01-31 10:01:41,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:01:41,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:41,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:41,622 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:41,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 10:01:41,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:01:41,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 10:01:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:01:41,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:01:42,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503389888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:42,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:42,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 10:01:42,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016758732] [2022-01-31 10:01:42,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:42,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:01:42,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:01:42,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 10:01:42,115 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:42,566 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-01-31 10:01:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 10:01:42,566 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 10:01:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:42,567 INFO L225 Difference]: With dead ends: 79 [2022-01-31 10:01:42,567 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 10:01:42,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=653, Invalid=2539, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 10:01:42,573 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:42,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 59 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:01:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 10:01:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-01-31 10:01:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 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 10:01:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-01-31 10:01:42,576 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2022-01-31 10:01:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:42,576 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-01-31 10:01:42,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-01-31 10:01:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 10:01:42,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:42,577 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:42,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:42,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 10:01:42,791 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1534525320, now seen corresponding path program 27 times [2022-01-31 10:01:42,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:42,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676597853] [2022-01-31 10:01:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:42,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:47,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:47,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:47,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676597853] [2022-01-31 10:01:47,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676597853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:47,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490793532] [2022-01-31 10:01:47,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:01:47,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:47,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:47,566 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:47,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 10:01:47,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 10:01:47,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 112 conjunts are in the unsatisfiable core [2022-01-31 10:01:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:47,878 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 10:01:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:53,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:01:53,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 92 treesize of output 245 [2022-01-31 10:01:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 11 proven. 264 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:01:54,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:02:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490793532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:13,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:13,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 52, 46] total 152 [2022-01-31 10:02:13,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262931112] [2022-01-31 10:02:13,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:13,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 10:02:13,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 10:02:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=21920, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 10:02:13,843 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 152 states, 152 states have (on average 1.1710526315789473) internal successors, (178), 149 states have internal predecessors, (178), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:29,385 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-01-31 10:02:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 10:02:29,387 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.1710526315789473) internal successors, (178), 149 states have internal predecessors, (178), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 10:02:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:29,387 INFO L225 Difference]: With dead ends: 105 [2022-01-31 10:02:29,388 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 10:02:29,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10107 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=2345, Invalid=45397, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 10:02:29,390 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 4697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2114 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:29,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 377 Invalid, 4697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2410 Invalid, 0 Unknown, 2114 Unchecked, 1.5s Time] [2022-01-31 10:02:29,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 10:02:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2022-01-31 10:02:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 3 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 10:02:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-01-31 10:02:29,392 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 76 [2022-01-31 10:02:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:29,393 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-01-31 10:02:29,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.1710526315789473) internal successors, (178), 149 states have internal predecessors, (178), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-01-31 10:02:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 10:02:29,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:29,393 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:29,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-31 10:02:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:29,603 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1877567322, now seen corresponding path program 28 times [2022-01-31 10:02:29,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:29,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58576569] [2022-01-31 10:02:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:29,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:29,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:02:29,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:29,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58576569] [2022-01-31 10:02:29,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58576569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:29,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250675122] [2022-01-31 10:02:29,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:02:29,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:29,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:29,830 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:02:29,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 10:02:29,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:02:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:29,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 10:02:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:02:30,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:02:30,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250675122] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:30,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:30,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2022-01-31 10:02:30,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227792613] [2022-01-31 10:02:30,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:30,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 10:02:30,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:30,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 10:02:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 10:02:30,389 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:30,754 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2022-01-31 10:02:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 10:02:30,754 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 10:02:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:30,755 INFO L225 Difference]: With dead ends: 136 [2022-01-31 10:02:30,755 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 10:02:30,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=578, Invalid=1972, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 10:02:30,756 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:30,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 57 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:02:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 10:02:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-01-31 10:02:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 3 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 10:02:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-01-31 10:02:30,759 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2022-01-31 10:02:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:30,759 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-01-31 10:02:30,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-01-31 10:02:30,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 10:02:30,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:30,760 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:30,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:30,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:30,965 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1312667267, now seen corresponding path program 29 times [2022-01-31 10:02:30,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:30,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962137630] [2022-01-31 10:02:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:30,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:31,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:02:31,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962137630] [2022-01-31 10:02:31,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962137630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971849282] [2022-01-31 10:02:31,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:02:31,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:31,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:31,200 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:02:31,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-31 10:02:31,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-31 10:02:31,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:31,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 10:02:31,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:02:31,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:02:31,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971849282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:31,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:31,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2022-01-31 10:02:31,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376583706] [2022-01-31 10:02:31,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:31,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 10:02:31,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:31,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 10:02:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 10:02:31,861 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.769230769230769) internal successors, (108), 38 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:32,393 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2022-01-31 10:02:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 10:02:32,393 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.769230769230769) internal successors, (108), 38 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 10:02:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:32,393 INFO L225 Difference]: With dead ends: 85 [2022-01-31 10:02:32,394 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 10:02:32,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=771, Invalid=3011, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 10:02:32,394 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:32,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 65 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:02:32,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 10:02:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-01-31 10:02:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 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 10:02:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-01-31 10:02:32,396 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2022-01-31 10:02:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:32,396 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-01-31 10:02:32,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.769230769230769) internal successors, (108), 38 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-01-31 10:02:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 10:02:32,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:32,397 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:32,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:32,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:32,603 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:32,604 INFO L85 PathProgramCache]: Analyzing trace with hash -334791455, now seen corresponding path program 30 times [2022-01-31 10:02:32,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:32,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071549687] [2022-01-31 10:02:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:32,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:37,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 25 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:37,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:37,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071549687] [2022-01-31 10:02:37,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071549687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:37,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381967894] [2022-01-31 10:02:37,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:02:37,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:37,985 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:02:37,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-31 10:02:38,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-31 10:02:38,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:38,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 122 conjunts are in the unsatisfiable core [2022-01-31 10:02:38,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:38,319 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 10:02:47,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:47,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:02:47,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 158 treesize of output 593 [2022-01-31 10:02:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 17 proven. 282 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:02:49,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:03:14,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381967894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:14,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:14,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 54, 50] total 163 [2022-01-31 10:03:14,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237788596] [2022-01-31 10:03:14,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:14,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-01-31 10:03:14,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-01-31 10:03:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=25164, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 10:03:14,026 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 163 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 160 states have internal predecessors, (189), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:36,282 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-01-31 10:03:36,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 10:03:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 160 states have internal predecessors, (189), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 10:03:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:36,289 INFO L225 Difference]: With dead ends: 113 [2022-01-31 10:03:36,289 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 10:03:36,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10220 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=2755, Invalid=52705, Unknown=0, NotChecked=0, Total=55460 [2022-01-31 10:03:36,292 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 2898 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 5227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2087 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:36,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 387 Invalid, 5227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2898 Invalid, 0 Unknown, 2087 Unchecked, 1.9s Time] [2022-01-31 10:03:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 10:03:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2022-01-31 10:03:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 3 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 10:03:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-01-31 10:03:36,294 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 82 [2022-01-31 10:03:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:36,294 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-01-31 10:03:36,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 160 states have internal predecessors, (189), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-01-31 10:03:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 10:03:36,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:36,294 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:36,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:36,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-31 10:03:36,507 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1300308927, now seen corresponding path program 31 times [2022-01-31 10:03:36,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:36,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980676156] [2022-01-31 10:03:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:36,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:36,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:03:36,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:36,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980676156] [2022-01-31 10:03:36,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980676156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:36,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897210960] [2022-01-31 10:03:36,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:03:36,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:36,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:36,775 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:36,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-31 10:03:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 10:03:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:03:37,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:03:37,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897210960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:37,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:37,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 42 [2022-01-31 10:03:37,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747691260] [2022-01-31 10:03:37,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:37,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 10:03:37,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 10:03:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 10:03:37,404 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:37,773 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-01-31 10:03:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 10:03:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 10:03:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:37,774 INFO L225 Difference]: With dead ends: 146 [2022-01-31 10:03:37,774 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 10:03:37,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 10:03:37,775 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 181 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:37,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 47 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:03:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 10:03:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2022-01-31 10:03:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 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 10:03:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-01-31 10:03:37,776 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2022-01-31 10:03:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:37,777 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-01-31 10:03:37,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-01-31 10:03:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 10:03:37,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:37,777 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:37,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:37,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:37,989 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1256650716, now seen corresponding path program 32 times [2022-01-31 10:03:37,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:37,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849137878] [2022-01-31 10:03:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:37,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:38,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 10:03:38,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849137878] [2022-01-31 10:03:38,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849137878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714411754] [2022-01-31 10:03:38,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:03:38,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:38,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:38,279 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:38,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-31 10:03:38,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:03:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:38,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 10:03:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 10:03:38,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 10:03:38,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714411754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:38,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:38,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 42 [2022-01-31 10:03:38,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726195499] [2022-01-31 10:03:38,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:38,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 10:03:38,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 10:03:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 10:03:38,848 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:39,433 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-01-31 10:03:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 10:03:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 10:03:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:39,434 INFO L225 Difference]: With dead ends: 91 [2022-01-31 10:03:39,434 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 10:03:39,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=899, Invalid=3523, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 10:03:39,435 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 124 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:39,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 79 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:03:39,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 10:03:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-01-31 10:03:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-01-31 10:03:39,437 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2022-01-31 10:03:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:39,437 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-01-31 10:03:39,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-01-31 10:03:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 10:03:39,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:39,437 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:39,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:39,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:39,654 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1667877882, now seen corresponding path program 33 times [2022-01-31 10:03:39,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:39,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433091509] [2022-01-31 10:03:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:39,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:03:46,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:46,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433091509] [2022-01-31 10:03:46,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433091509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:46,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290078374] [2022-01-31 10:03:46,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:03:46,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:46,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:46,843 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:46,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-31 10:03:46,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-31 10:03:46,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:46,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 132 conjunts are in the unsatisfiable core [2022-01-31 10:03:46,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:47,305 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 10:03:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:56,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:03:56,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 347 [2022-01-31 10:03:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 13 proven. 383 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 10:03:57,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:04:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:04:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290078374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:04:31,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:04:31,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 61, 54] total 181 [2022-01-31 10:04:31,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863038096] [2022-01-31 10:04:31,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:04:31,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2022-01-31 10:04:31,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:04:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2022-01-31 10:04:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1350, Invalid=31230, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 10:04:31,009 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 181 states, 181 states have (on average 1.149171270718232) internal successors, (208), 178 states have internal predecessors, (208), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:51,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-01-31 10:04:51,906 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-31 10:04:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 10:04:51,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11789 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=2742, Invalid=58514, Unknown=0, NotChecked=0, Total=61256 [2022-01-31 10:04:51,909 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2283 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:04:51,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 487 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3362 Invalid, 0 Unknown, 2283 Unchecked, 2.1s Time] [2022-01-31 10:04:51,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-31 10:04:52,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-31 10:04:52,110 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 49 more [2022-01-31 10:04:52,114 INFO L158 Benchmark]: Toolchain (without parser) took 397918.83ms. Allocated memory was 168.8MB in the beginning and 316.7MB in the end (delta: 147.8MB). Free memory was 120.0MB in the beginning and 76.8MB in the end (delta: 43.3MB). Peak memory consumption was 192.4MB. Max. memory is 8.0GB. [2022-01-31 10:04:52,114 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 168.8MB. Free memory was 136.4MB in the beginning and 136.3MB in the end (delta: 71.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 10:04:52,114 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.07ms. Allocated memory is still 168.8MB. Free memory was 119.9MB in the beginning and 145.3MB in the end (delta: -25.5MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. [2022-01-31 10:04:52,114 INFO L158 Benchmark]: Boogie Preprocessor took 32.60ms. Allocated memory is still 168.8MB. Free memory was 145.3MB in the beginning and 144.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 10:04:52,114 INFO L158 Benchmark]: RCFGBuilder took 265.01ms. Allocated memory is still 168.8MB. Free memory was 143.7MB in the beginning and 133.0MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 10:04:52,114 INFO L158 Benchmark]: IcfgTransformer took 19.53ms. Allocated memory is still 168.8MB. Free memory was 133.0MB in the beginning and 131.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 10:04:52,115 INFO L158 Benchmark]: TraceAbstraction took 397435.56ms. Allocated memory was 168.8MB in the beginning and 316.7MB in the end (delta: 147.8MB). Free memory was 131.2MB in the beginning and 76.8MB in the end (delta: 54.4MB). Peak memory consumption was 203.8MB. Max. memory is 8.0GB. [2022-01-31 10:04:52,115 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 168.8MB. Free memory was 136.4MB in the beginning and 136.3MB in the end (delta: 71.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 159.07ms. Allocated memory is still 168.8MB. Free memory was 119.9MB in the beginning and 145.3MB in the end (delta: -25.5MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.60ms. Allocated memory is still 168.8MB. Free memory was 145.3MB in the beginning and 144.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 265.01ms. Allocated memory is still 168.8MB. Free memory was 143.7MB in the beginning and 133.0MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 19.53ms. Allocated memory is still 168.8MB. Free memory was 133.0MB in the beginning and 131.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 397435.56ms. Allocated memory was 168.8MB in the beginning and 316.7MB in the end (delta: 147.8MB). Free memory was 131.2MB in the beginning and 76.8MB in the end (delta: 54.4MB). Peak memory consumption was 203.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...