/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:51:57,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:51:57,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:51:57,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 03:51:57,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 03:51:57,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 03:51:57,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 03:51:57,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 03:51:57,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 03:51:57,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 03:51:57,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 03:51:57,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 03:51:57,458 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 03:51:57,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 03:51:57,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 03:51:57,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 03:51:57,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 03:51:57,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 03:51:57,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:51:57,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:51:57,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:51:57,469 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:51:57,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:51:57,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:51:57,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:51:57,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:51:57,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:51:57,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:51:57,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:51:57,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:51:57,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:51:57,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:51:57,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:51:57,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:51:57,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:51:57,479 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:51:57,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:51:57,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:51:57,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:51:57,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:51:57,692 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:51:57,694 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:51:57,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-03-20 03:51:57,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307dd6a1c/f8879709a9244ddc83870d3958514993/FLAGd5ea08e8f [2022-03-20 03:51:58,048 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:51:58,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-03-20 03:51:58,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307dd6a1c/f8879709a9244ddc83870d3958514993/FLAGd5ea08e8f [2022-03-20 03:51:58,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307dd6a1c/f8879709a9244ddc83870d3958514993 [2022-03-20 03:51:58,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:51:58,491 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:51:58,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:51:58,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:51:58,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:51:58,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5649e7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58, skipping insertion in model container [2022-03-20 03:51:58,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:51:58,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:51:58,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-03-20 03:51:58,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:51:58,681 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:51:58,699 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-03-20 03:51:58,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:51:58,714 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:51:58,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58 WrapperNode [2022-03-20 03:51:58,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:51:58,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:51:58,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:51:58,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:51:58,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:51:58,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:51:58,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:51:58,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:51:58,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (1/1) ... [2022-03-20 03:51:58,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:51:58,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:51:58,785 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) [2022-03-20 03:51:58,804 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 [2022-03-20 03:51:58,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:51:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:51:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:51:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:51:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:51:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:51:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:51:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:51:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:51:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:51:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:51:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:51:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:51:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:51:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:51:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:51:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:51:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:51:58,863 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:51:58,864 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:51:58,998 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:51:59,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:51:59,006 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 03:51:59,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:51:59 BoogieIcfgContainer [2022-03-20 03:51:59,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:51:59,008 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:51:59,008 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:51:59,020 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:51:59,022 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:51:59" (1/1) ... [2022-03-20 03:51:59,023 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:51:59,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:51:59 BasicIcfg [2022-03-20 03:51:59,033 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:51:59,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:51:59,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:51:59,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:51:59,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:51:58" (1/4) ... [2022-03-20 03:51:59,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b58ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:51:59, skipping insertion in model container [2022-03-20 03:51:59,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:51:58" (2/4) ... [2022-03-20 03:51:59,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b58ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:51:59, skipping insertion in model container [2022-03-20 03:51:59,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:51:59" (3/4) ... [2022-03-20 03:51:59,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b58ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:51:59, skipping insertion in model container [2022-03-20 03:51:59,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:51:59" (4/4) ... [2022-03-20 03:51:59,059 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.cJordan [2022-03-20 03:51:59,063 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:51:59,063 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:51:59,099 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:51:59,108 INFO L340 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 [2022-03-20 03:51:59,109 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:51:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-03-20 03:51:59,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 03:51:59,134 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:51:59,134 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:51:59,135 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:51:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:51:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash -617670298, now seen corresponding path program 1 times [2022-03-20 03:51:59,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:51:59,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389944077] [2022-03-20 03:51:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:51:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:51:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:51:59,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:51:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:51:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:51:59,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:51:59,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389944077] [2022-03-20 03:51:59,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389944077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:51:59,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:51:59,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:51:59,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593385653] [2022-03-20 03:51:59,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:51:59,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:51:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:51:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:51:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:51:59,376 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-20 03:51:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:51:59,428 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-03-20 03:51:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:51:59,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-03-20 03:51:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:51:59,437 INFO L225 Difference]: With dead ends: 23 [2022-03-20 03:51:59,437 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 03:51:59,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:51:59,442 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:51:59,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:51:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 03:51:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-03-20 03:51:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:51:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-20 03:51:59,466 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-03-20 03:51:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:51:59,466 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-20 03:51:59,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-20 03:51:59,467 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-20 03:51:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:51:59,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:51:59,467 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:51:59,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:51:59,468 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:51:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:51:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1333032525, now seen corresponding path program 1 times [2022-03-20 03:51:59,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:51:59,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417091773] [2022-03-20 03:51:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:51:59,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:51:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:51:59,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:51:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:51:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:51:59,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:51:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417091773] [2022-03-20 03:51:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417091773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:51:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986245335] [2022-03-20 03:51:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:51:59,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:51:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:51:59,538 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) [2022-03-20 03:51:59,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:51:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:51:59,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-03-20 03:51:59,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:51:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:51:59,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:51:59,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986245335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:51:59,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:51:59,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-03-20 03:51:59,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460769456] [2022-03-20 03:51:59,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:51:59,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:51:59,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:51:59,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:51:59,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:51:59,650 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:51:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:51:59,680 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-03-20 03:51:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:51:59,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 03:51:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:51:59,682 INFO L225 Difference]: With dead ends: 23 [2022-03-20 03:51:59,682 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 03:51:59,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:51:59,684 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:51:59,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:51:59,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 03:51:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-20 03:51:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:51:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-20 03:51:59,689 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2022-03-20 03:51:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:51:59,689 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-20 03:51:59,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:51:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-20 03:51:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:51:59,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:51:59,690 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:51:59,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 03:51:59,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:51:59,908 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:51:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:51:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1332109004, now seen corresponding path program 1 times [2022-03-20 03:51:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:51:59,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947562668] [2022-03-20 03:51:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:51:59,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:51:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:51:59,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:51:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:51:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:51:59,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:51:59,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947562668] [2022-03-20 03:51:59,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947562668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:51:59,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112129710] [2022-03-20 03:51:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:51:59,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:51:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:51:59,974 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) [2022-03-20 03:51:59,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:52:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 03:52:00,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:00,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:00,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112129710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:00,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:00,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 03:52:00,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366080747] [2022-03-20 03:52:00,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:00,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:52:00,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:52:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:52:00,144 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:00,193 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-03-20 03:52:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:52:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 03:52:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:00,194 INFO L225 Difference]: With dead ends: 31 [2022-03-20 03:52:00,194 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 03:52:00,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:52:00,195 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:00,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 39 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:52:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 03:52:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 03:52:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:52:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-20 03:52:00,198 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2022-03-20 03:52:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:00,198 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-20 03:52:00,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-20 03:52:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 03:52:00,199 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:00,199 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:00,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:00,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 03:52:00,417 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash -771028313, now seen corresponding path program 2 times [2022-03-20 03:52:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:00,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387176382] [2022-03-20 03:52:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 03:52:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387176382] [2022-03-20 03:52:00,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387176382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943235022] [2022-03-20 03:52:00,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:52:00,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:00,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:00,508 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) [2022-03-20 03:52:00,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:52:00,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:52:00,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:52:00,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 03:52:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 03:52:00,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 03:52:00,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943235022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:00,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:00,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-20 03:52:00,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150698536] [2022-03-20 03:52:00,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:00,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 03:52:00,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:00,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 03:52:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:52:00,738 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-03-20 03:52:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:00,952 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-03-20 03:52:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 03:52:00,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 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 26 [2022-03-20 03:52:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:00,956 INFO L225 Difference]: With dead ends: 93 [2022-03-20 03:52:00,956 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 03:52:00,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:52:00,959 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:00,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:52:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 03:52:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2022-03-20 03:52:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 66 states have internal predecessors, (85), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:52:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-03-20 03:52:00,980 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 26 [2022-03-20 03:52:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:00,980 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-03-20 03:52:00,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-03-20 03:52:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-03-20 03:52:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 03:52:00,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:00,981 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:01,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:01,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:01,202 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:01,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1042301816, now seen corresponding path program 1 times [2022-03-20 03:52:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:01,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010423213] [2022-03-20 03:52:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:01,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:01,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:52:01,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:01,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010423213] [2022-03-20 03:52:01,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010423213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:01,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954490239] [2022-03-20 03:52:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:01,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:01,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:01,262 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) [2022-03-20 03:52:01,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 03:52:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 03:52:01,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:52:01,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:52:01,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954490239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:52:01,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:52:01,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-03-20 03:52:01,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110704577] [2022-03-20 03:52:01,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:52:01,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 03:52:01,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 03:52:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 03:52:01,353 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:01,392 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2022-03-20 03:52:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 03:52:01,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 03:52:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:01,394 INFO L225 Difference]: With dead ends: 136 [2022-03-20 03:52:01,394 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 03:52:01,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 03:52:01,395 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:01,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:52:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 03:52:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2022-03-20 03:52:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 91 states have internal predecessors, (115), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:52:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-03-20 03:52:01,402 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 26 [2022-03-20 03:52:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:01,402 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-03-20 03:52:01,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-03-20 03:52:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 03:52:01,403 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:01,403 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:01,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:01,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:01,614 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -913219097, now seen corresponding path program 2 times [2022-03-20 03:52:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:01,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804824735] [2022-03-20 03:52:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:01,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:01,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:01,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804824735] [2022-03-20 03:52:01,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804824735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585974235] [2022-03-20 03:52:01,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:52:01,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:01,730 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) [2022-03-20 03:52:01,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 03:52:01,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:52:01,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:52:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 03:52:01,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:01,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:01,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585974235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:01,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:01,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 03:52:01,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98334392] [2022-03-20 03:52:01,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:01,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 03:52:01,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 03:52:01,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:52:01,915 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 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) [2022-03-20 03:52:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:02,005 INFO L93 Difference]: Finished difference Result 235 states and 277 transitions. [2022-03-20 03:52:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 03:52:02,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 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 26 [2022-03-20 03:52:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:02,007 INFO L225 Difference]: With dead ends: 235 [2022-03-20 03:52:02,007 INFO L226 Difference]: Without dead ends: 235 [2022-03-20 03:52:02,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:52:02,008 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:02,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:52:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-20 03:52:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2022-03-20 03:52:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 198 states have (on average 1.2171717171717171) internal successors, (241), 199 states have internal predecessors, (241), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:52:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 250 transitions. [2022-03-20 03:52:02,033 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 250 transitions. Word has length 26 [2022-03-20 03:52:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:02,033 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 250 transitions. [2022-03-20 03:52:02,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 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) [2022-03-20 03:52:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 250 transitions. [2022-03-20 03:52:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 03:52:02,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:02,035 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:02,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:02,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:02,248 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1702419303, now seen corresponding path program 3 times [2022-03-20 03:52:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528763680] [2022-03-20 03:52:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:02,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:02,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:02,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528763680] [2022-03-20 03:52:02,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528763680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:02,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301919094] [2022-03-20 03:52:02,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:52:02,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:02,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:02,436 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) [2022-03-20 03:52:02,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 03:52:02,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 03:52:02,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:52:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 03:52:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-20 03:52:02,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:52:02,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301919094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:52:02,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:52:02,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2022-03-20 03:52:02,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725801174] [2022-03-20 03:52:02,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:52:02,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 03:52:02,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:02,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 03:52:02,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:52:02,748 INFO L87 Difference]: Start difference. First operand 208 states and 250 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:02,797 INFO L93 Difference]: Finished difference Result 347 states and 407 transitions. [2022-03-20 03:52:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 03:52:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 03:52:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:02,799 INFO L225 Difference]: With dead ends: 347 [2022-03-20 03:52:02,799 INFO L226 Difference]: Without dead ends: 347 [2022-03-20 03:52:02,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-20 03:52:02,800 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:02,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 74 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:52:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-20 03:52:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-03-20 03:52:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 328 states have (on average 1.1859756097560976) internal successors, (389), 331 states have internal predecessors, (389), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:52:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 404 transitions. [2022-03-20 03:52:02,823 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 404 transitions. Word has length 44 [2022-03-20 03:52:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:02,824 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 404 transitions. [2022-03-20 03:52:02,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 404 transitions. [2022-03-20 03:52:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 03:52:02,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:02,826 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:02,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:03,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:03,047 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1136577574, now seen corresponding path program 1 times [2022-03-20 03:52:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:03,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874506507] [2022-03-20 03:52:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:03,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:03,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874506507] [2022-03-20 03:52:03,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874506507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:03,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730559370] [2022-03-20 03:52:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:03,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:03,155 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) [2022-03-20 03:52:03,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 03:52:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:03,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 03:52:03,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:03,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:03,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730559370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:03,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:03,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 03:52:03,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661849250] [2022-03-20 03:52:03,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:03,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 03:52:03,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 03:52:03,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 03:52:03,463 INFO L87 Difference]: Start difference. First operand 344 states and 404 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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) [2022-03-20 03:52:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:03,571 INFO L93 Difference]: Finished difference Result 778 states and 886 transitions. [2022-03-20 03:52:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 03:52:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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 [2022-03-20 03:52:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:03,575 INFO L225 Difference]: With dead ends: 778 [2022-03-20 03:52:03,575 INFO L226 Difference]: Without dead ends: 778 [2022-03-20 03:52:03,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 03:52:03,576 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 137 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:03,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 39 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:52:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-03-20 03:52:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 704. [2022-03-20 03:52:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 688 states have (on average 1.1584302325581395) internal successors, (797), 691 states have internal predecessors, (797), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:52:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 812 transitions. [2022-03-20 03:52:03,585 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 812 transitions. Word has length 44 [2022-03-20 03:52:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:03,585 INFO L478 AbstractCegarLoop]: Abstraction has 704 states and 812 transitions. [2022-03-20 03:52:03,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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) [2022-03-20 03:52:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 812 transitions. [2022-03-20 03:52:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 03:52:03,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:03,587 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:03,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:03,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:03,804 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash -627106906, now seen corresponding path program 2 times [2022-03-20 03:52:03,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:03,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042812864] [2022-03-20 03:52:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:03,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:04,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:04,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:04,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042812864] [2022-03-20 03:52:04,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042812864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:04,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430862381] [2022-03-20 03:52:04,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:52:04,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:04,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:04,104 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) [2022-03-20 03:52:04,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 03:52:04,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:52:04,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:52:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 03:52:04,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:04,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:04,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430862381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:04,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:04,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 53 [2022-03-20 03:52:04,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41795247] [2022-03-20 03:52:04,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:04,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 03:52:04,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:04,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 03:52:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 03:52:04,897 INFO L87 Difference]: Start difference. First operand 704 states and 812 transitions. Second operand has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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) [2022-03-20 03:52:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:07,118 INFO L93 Difference]: Finished difference Result 1970 states and 2274 transitions. [2022-03-20 03:52:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-20 03:52:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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 [2022-03-20 03:52:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:07,124 INFO L225 Difference]: With dead ends: 1970 [2022-03-20 03:52:07,124 INFO L226 Difference]: Without dead ends: 1970 [2022-03-20 03:52:07,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6559, Invalid=14611, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 03:52:07,129 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 692 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:07,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 59 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 03:52:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-03-20 03:52:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1020. [2022-03-20 03:52:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1004 states have (on average 1.202191235059761) internal successors, (1207), 1007 states have internal predecessors, (1207), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:52:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1222 transitions. [2022-03-20 03:52:07,149 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1222 transitions. Word has length 80 [2022-03-20 03:52:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:07,149 INFO L478 AbstractCegarLoop]: Abstraction has 1020 states and 1222 transitions. [2022-03-20 03:52:07,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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) [2022-03-20 03:52:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1222 transitions. [2022-03-20 03:52:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 03:52:07,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:07,154 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:07,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:07,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 03:52:07,371 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:07,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash 238951605, now seen corresponding path program 1 times [2022-03-20 03:52:07,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:07,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469888755] [2022-03-20 03:52:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:07,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:07,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-03-20 03:52:07,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:07,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469888755] [2022-03-20 03:52:07,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469888755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:52:07,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:52:07,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:52:07,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143194994] [2022-03-20 03:52:07,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:52:07,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:52:07,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:07,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:52:07,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:52:07,447 INFO L87 Difference]: Start difference. First operand 1020 states and 1222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-03-20 03:52:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:07,470 INFO L93 Difference]: Finished difference Result 1031 states and 1233 transitions. [2022-03-20 03:52:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:52:07,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 149 [2022-03-20 03:52:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:07,474 INFO L225 Difference]: With dead ends: 1031 [2022-03-20 03:52:07,474 INFO L226 Difference]: Without dead ends: 1031 [2022-03-20 03:52:07,475 INFO L912 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 [2022-03-20 03:52:07,475 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:07,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:52:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-03-20 03:52:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1016. [2022-03-20 03:52:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.199) internal successors, (1199), 1003 states have internal predecessors, (1199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:52:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1214 transitions. [2022-03-20 03:52:07,493 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1214 transitions. Word has length 149 [2022-03-20 03:52:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:07,494 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1214 transitions. [2022-03-20 03:52:07,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-03-20 03:52:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1214 transitions. [2022-03-20 03:52:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-20 03:52:07,496 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:07,496 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:07,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 03:52:07,496 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:07,497 INFO L85 PathProgramCache]: Analyzing trace with hash 147487398, now seen corresponding path program 3 times [2022-03-20 03:52:07,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:07,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836130305] [2022-03-20 03:52:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:07,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:08,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:52:08,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:08,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836130305] [2022-03-20 03:52:08,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836130305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:08,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305872851] [2022-03-20 03:52:08,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:52:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:08,375 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) [2022-03-20 03:52:08,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 03:52:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 03:52:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:52:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 03:52:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-03-20 03:52:09,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:52:09,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305872851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:52:09,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:52:09,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [50] total 57 [2022-03-20 03:52:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059314473] [2022-03-20 03:52:09,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:52:09,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 03:52:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 03:52:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1995, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 03:52:09,124 INFO L87 Difference]: Start difference. First operand 1016 states and 1214 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:09,179 INFO L93 Difference]: Finished difference Result 1023 states and 1221 transitions. [2022-03-20 03:52:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 03:52:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-03-20 03:52:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:09,183 INFO L225 Difference]: With dead ends: 1023 [2022-03-20 03:52:09,183 INFO L226 Difference]: Without dead ends: 1023 [2022-03-20 03:52:09,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 03:52:09,184 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:09,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:52:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-03-20 03:52:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1016. [2022-03-20 03:52:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.199) internal successors, (1199), 1003 states have internal predecessors, (1199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:52:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1214 transitions. [2022-03-20 03:52:09,198 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1214 transitions. Word has length 152 [2022-03-20 03:52:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:09,198 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1214 transitions. [2022-03-20 03:52:09,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1214 transitions. [2022-03-20 03:52:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-20 03:52:09,201 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:09,201 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 88, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:09,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 03:52:09,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:09,415 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:09,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2003780641, now seen corresponding path program 1 times [2022-03-20 03:52:09,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:09,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7074524] [2022-03-20 03:52:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:09,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:10,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:10,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-20 03:52:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3018 trivial. 0 not checked. [2022-03-20 03:52:10,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:10,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7074524] [2022-03-20 03:52:10,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7074524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:10,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820977647] [2022-03-20 03:52:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:10,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:10,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:10,314 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) [2022-03-20 03:52:10,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 03:52:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:10,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 03:52:10,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2022-03-20 03:52:10,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3018 trivial. 0 not checked. [2022-03-20 03:52:12,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820977647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:12,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:12,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 03:52:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157377044] [2022-03-20 03:52:12,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:12,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 03:52:12,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:12,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 03:52:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 03:52:12,954 INFO L87 Difference]: Start difference. First operand 1016 states and 1214 transitions. Second operand has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:52:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:13,507 INFO L93 Difference]: Finished difference Result 6597 states and 6981 transitions. [2022-03-20 03:52:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 03:52:13,508 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 293 [2022-03-20 03:52:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:13,523 INFO L225 Difference]: With dead ends: 6597 [2022-03-20 03:52:13,523 INFO L226 Difference]: Without dead ends: 6597 [2022-03-20 03:52:13,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 03:52:13,525 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 582 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:13,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 56 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 03:52:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2022-03-20 03:52:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 2416. [2022-03-20 03:52:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2400 states have (on average 1.1604166666666667) internal successors, (2785), 2403 states have internal predecessors, (2785), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:52:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 2800 transitions. [2022-03-20 03:52:13,575 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 2800 transitions. Word has length 293 [2022-03-20 03:52:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:13,576 INFO L478 AbstractCegarLoop]: Abstraction has 2416 states and 2800 transitions. [2022-03-20 03:52:13,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:52:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 2800 transitions. [2022-03-20 03:52:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-03-20 03:52:13,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:13,584 INFO L499 BasicCegarLoop]: trace histogram [184, 184, 182, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:13,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:13,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 03:52:13,817 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:13,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1845473477, now seen corresponding path program 2 times [2022-03-20 03:52:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:13,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916889512] [2022-03-20 03:52:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:13,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:15,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:15,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2022-03-20 03:52:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25580 proven. 12650 refuted. 0 times theorem prover too weak. 12653 trivial. 0 not checked. [2022-03-20 03:52:15,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:15,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916889512] [2022-03-20 03:52:15,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916889512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:15,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335690908] [2022-03-20 03:52:15,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:52:15,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:15,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:16,016 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) [2022-03-20 03:52:16,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 03:52:16,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:52:16,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:52:16,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 03:52:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12655 trivial. 0 not checked. [2022-03-20 03:52:16,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25580 proven. 12650 refuted. 0 times theorem prover too weak. 12653 trivial. 0 not checked. [2022-03-20 03:52:24,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335690908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:24,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:24,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-20 03:52:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631329124] [2022-03-20 03:52:24,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:24,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-03-20 03:52:24,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-03-20 03:52:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 03:52:24,270 INFO L87 Difference]: Start difference. First operand 2416 states and 2800 transitions. Second operand has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:52:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:27,602 INFO L93 Difference]: Finished difference Result 12809 states and 13569 transitions. [2022-03-20 03:52:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-03-20 03:52:27,603 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 575 [2022-03-20 03:52:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:27,629 INFO L225 Difference]: With dead ends: 12809 [2022-03-20 03:52:27,629 INFO L226 Difference]: Without dead ends: 12809 [2022-03-20 03:52:27,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1248 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 03:52:27,631 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 1299 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:27,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1299 Valid, 50 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 03:52:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12809 states. [2022-03-20 03:52:27,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12809 to 5236. [2022-03-20 03:52:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5220 states have (on average 1.1457854406130268) internal successors, (5981), 5223 states have internal predecessors, (5981), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 03:52:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 5996 transitions. [2022-03-20 03:52:27,720 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 5996 transitions. Word has length 575 [2022-03-20 03:52:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:27,720 INFO L478 AbstractCegarLoop]: Abstraction has 5236 states and 5996 transitions. [2022-03-20 03:52:27,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:52:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 5996 transitions. [2022-03-20 03:52:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2022-03-20 03:52:27,745 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:27,745 INFO L499 BasicCegarLoop]: trace histogram [372, 372, 370, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:27,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 03:52:27,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 03:52:27,962 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2142701381, now seen corresponding path program 3 times [2022-03-20 03:52:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339098119] [2022-03-20 03:52:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:27,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:35,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:52:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2022-03-20 03:52:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:52:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 104164 proven. 51801 refuted. 0 times theorem prover too weak. 51804 trivial. 0 not checked. [2022-03-20 03:52:35,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:52:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339098119] [2022-03-20 03:52:35,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339098119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:52:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520636685] [2022-03-20 03:52:35,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:52:35,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:35,403 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) [2022-03-20 03:52:35,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 03:52:35,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 03:52:35,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:52:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 03:52:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:52:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 558 proven. 104165 refuted. 0 times theorem prover too weak. 103046 trivial. 0 not checked. [2022-03-20 03:52:39,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:52:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 5 proven. 1115 refuted. 0 times theorem prover too weak. 206649 trivial. 0 not checked. [2022-03-20 03:52:42,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520636685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:52:42,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:52:42,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [190, 10, 8] total 202 [2022-03-20 03:52:42,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705904830] [2022-03-20 03:52:42,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:52:42,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-03-20 03:52:42,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:52:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-03-20 03:52:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18187, Invalid=22415, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 03:52:42,176 INFO L87 Difference]: Start difference. First operand 5236 states and 5996 transitions. Second operand has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:53:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:53:37,245 INFO L93 Difference]: Finished difference Result 10391 states and 11733 transitions. [2022-03-20 03:53:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2022-03-20 03:53:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 1139 [2022-03-20 03:53:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:53:37,248 INFO L225 Difference]: With dead ends: 10391 [2022-03-20 03:53:37,248 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 03:53:37,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3039 GetRequests, 2268 SyntacticMatches, 3 SemanticMatches, 768 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165203 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=163348, Invalid=428782, Unknown=0, NotChecked=0, Total=592130 [2022-03-20 03:53:37,283 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 5138 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5141 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:53:37,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5141 Valid, 107 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 03:53:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 03:53:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 03:53:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 03:53:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 03:53:37,284 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1139 [2022-03-20 03:53:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:53:37,284 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 03:53:37,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 03:53:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 03:53:37,285 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 03:53:37,287 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 03:53:37,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 03:53:37,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 03:53:37,507 INFO L719 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 1, 1, 1] [2022-03-20 03:53:37,508 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 03:53:37,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:53:37 BasicIcfg [2022-03-20 03:53:37,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 03:53:37,510 INFO L158 Benchmark]: Toolchain (without parser) took 99019.73ms. Allocated memory was 164.6MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 115.0MB in the beginning and 760.1MB in the end (delta: -645.1MB). Peak memory consumption was 538.4MB. Max. memory is 8.0GB. [2022-03-20 03:53:37,510 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 164.6MB. Free memory is still 131.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 03:53:37,510 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.05ms. Allocated memory is still 164.6MB. Free memory was 114.7MB in the beginning and 142.0MB in the end (delta: -27.3MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-03-20 03:53:37,511 INFO L158 Benchmark]: Boogie Preprocessor took 32.86ms. Allocated memory is still 164.6MB. Free memory was 142.0MB in the beginning and 140.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 03:53:37,511 INFO L158 Benchmark]: RCFGBuilder took 244.32ms. Allocated memory is still 164.6MB. Free memory was 140.5MB in the beginning and 130.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 03:53:37,511 INFO L158 Benchmark]: IcfgTransformer took 25.08ms. Allocated memory is still 164.6MB. Free memory was 130.5MB in the beginning and 129.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 03:53:37,511 INFO L158 Benchmark]: TraceAbstraction took 98475.89ms. Allocated memory was 164.6MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 129.1MB in the beginning and 760.1MB in the end (delta: -631.0MB). Peak memory consumption was 553.6MB. Max. memory is 8.0GB. [2022-03-20 03:53:37,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 164.6MB. Free memory is still 131.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 236.05ms. Allocated memory is still 164.6MB. Free memory was 114.7MB in the beginning and 142.0MB in the end (delta: -27.3MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.86ms. Allocated memory is still 164.6MB. Free memory was 142.0MB in the beginning and 140.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 244.32ms. Allocated memory is still 164.6MB. Free memory was 140.5MB in the beginning and 130.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 25.08ms. Allocated memory is still 164.6MB. Free memory was 130.5MB in the beginning and 129.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 98475.89ms. Allocated memory was 164.6MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 129.1MB in the beginning and 760.1MB in the end (delta: -631.0MB). Peak memory consumption was 553.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 98.4s, OverallIterations: 14, TraceHistogramMax: 372, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 62.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8030 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8018 mSDsluCounter, 742 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 476 mSDsCounter, 1111 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4194 IncrementalHoareTripleChecker+Invalid, 5305 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1111 mSolverCounterUnsat, 266 mSDtfsCounter, 4194 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5804 GetRequests, 4453 SyntacticMatches, 3 SemanticMatches, 1348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171672 ImplicationChecksByTransitivity, 60.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5236occurred in iteration=13, InterpolantAutomatonStates: 1099, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 12890 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 31.8s InterpolantComputationTime, 5041 NumberOfCodeBlocks, 3778 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 7207 ConstructedInterpolants, 0 QuantifiedInterpolants, 22625 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2393 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 614871/824930 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-20 03:53:37,543 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 0 Received shutdown request...