/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/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 05:32:29,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 05:32:29,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 05:32:29,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 05:32:29,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 05:32:29,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 05:32:29,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 05:32:29,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 05:32:29,476 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 05:32:29,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 05:32:29,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 05:32:29,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 05:32:29,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 05:32:29,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 05:32:29,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 05:32:29,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 05:32:29,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 05:32:29,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 05:32:29,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 05:32:29,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 05:32:29,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 05:32:29,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 05:32:29,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 05:32:29,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 05:32:29,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 05:32:29,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 05:32:29,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:32:29,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 05:32:29,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 05:32:29,479 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 05:32:29,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 05:32:29,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 05:32:29,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 05:32:29,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 05:32:29,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 05:32:29,687 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 05:32:29,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2022-04-06 05:32:29,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5302c705b/be8fdeb4cd7949608e21ddbf4effbd77/FLAGa0f618c16 [2022-04-06 05:32:30,080 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 05:32:30,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2022-04-06 05:32:30,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5302c705b/be8fdeb4cd7949608e21ddbf4effbd77/FLAGa0f618c16 [2022-04-06 05:32:30,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5302c705b/be8fdeb4cd7949608e21ddbf4effbd77 [2022-04-06 05:32:30,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 05:32:30,516 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 05:32:30,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 05:32:30,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 05:32:30,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 05:32:30,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d2579ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30, skipping insertion in model container [2022-04-06 05:32:30,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 05:32:30,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 05:32:30,640 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c[403,416] [2022-04-06 05:32:30,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:32:30,670 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 05:32:30,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c[403,416] [2022-04-06 05:32:30,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:32:30,690 INFO L208 MainTranslator]: Completed translation [2022-04-06 05:32:30,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30 WrapperNode [2022-04-06 05:32:30,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 05:32:30,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 05:32:30,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 05:32:30,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 05:32:30,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 05:32:30,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 05:32:30,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 05:32:30,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 05:32:30,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (1/1) ... [2022-04-06 05:32:30,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:32:30,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:32:30,770 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) [2022-04-06 05:32:30,771 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 [2022-04-06 05:32:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 05:32:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 05:32:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 05:32:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 05:32:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 05:32:30,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 05:32:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 05:32:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 05:32:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 05:32:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 05:32:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 05:32:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 05:32:30,843 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 05:32:30,845 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 05:32:35,337 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 05:32:35,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 05:32:35,341 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 05:32:35,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:32:35 BoogieIcfgContainer [2022-04-06 05:32:35,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 05:32:35,343 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 05:32:35,343 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 05:32:35,344 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 05:32:35,350 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:32:35" (1/1) ... [2022-04-06 05:32:35,351 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 05:32:35,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:32:35 BasicIcfg [2022-04-06 05:32:35,360 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 05:32:35,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 05:32:35,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 05:32:35,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 05:32:35,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:32:30" (1/4) ... [2022-04-06 05:32:35,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459408f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:32:35, skipping insertion in model container [2022-04-06 05:32:35,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:32:30" (2/4) ... [2022-04-06 05:32:35,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459408f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:32:35, skipping insertion in model container [2022-04-06 05:32:35,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:32:35" (3/4) ... [2022-04-06 05:32:35,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459408f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:32:35, skipping insertion in model container [2022-04-06 05:32:35,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:32:35" (4/4) ... [2022-04-06 05:32:35,365 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.cJordan [2022-04-06 05:32:35,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 05:32:35,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 05:32:35,393 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 05:32:35,399 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 [2022-04-06 05:32:35,399 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 05:32:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2022-04-06 05:32:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 05:32:35,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:32:35,414 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:32:35,414 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:32:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:32:35,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2113582840, now seen corresponding path program 1 times [2022-04-06 05:32:35,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:32:35,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016519278] [2022-04-06 05:32:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:32:35,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:32:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:35,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:32:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:35,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:32:35,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016519278] [2022-04-06 05:32:35,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016519278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:32:35,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:32:35,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 05:32:35,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623540795] [2022-04-06 05:32:35,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:32:35,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 05:32:35,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:32:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 05:32:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 05:32:35,569 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-06 05:32:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:32:35,604 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-04-06 05:32:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 05:32:35,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-04-06 05:32:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:32:35,612 INFO L225 Difference]: With dead ends: 25 [2022-04-06 05:32:35,612 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 05:32:35,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 05:32:35,619 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:32:35,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:32:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 05:32:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 05:32:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:32:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-04-06 05:32:35,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2022-04-06 05:32:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:32:35,641 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-04-06 05:32:35,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-06 05:32:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-04-06 05:32:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 05:32:35,642 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:32:35,643 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:32:35,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 05:32:35,643 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:32:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:32:35,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2112659319, now seen corresponding path program 1 times [2022-04-06 05:32:35,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:32:35,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033340867] [2022-04-06 05:32:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:32:35,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:32:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:35,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:32:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:35,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:32:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033340867] [2022-04-06 05:32:35,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033340867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:32:35,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:32:35,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 05:32:35,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437990692] [2022-04-06 05:32:35,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:32:35,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:32:35,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:32:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:32:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 05:32:35,949 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-06 05:32:38,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:40,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:32:40,406 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-04-06 05:32:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:32:40,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-04-06 05:32:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:32:40,408 INFO L225 Difference]: With dead ends: 23 [2022-04-06 05:32:40,408 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 05:32:40,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 05:32:40,409 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 05:32:40,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 05:32:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 05:32:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-04-06 05:32:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:32:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-04-06 05:32:40,412 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-04-06 05:32:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:32:40,412 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-04-06 05:32:40,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-06 05:32:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-04-06 05:32:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 05:32:40,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:32:40,413 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:32:40,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 05:32:40,413 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:32:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:32:40,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1428544074, now seen corresponding path program 1 times [2022-04-06 05:32:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:32:40,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265637529] [2022-04-06 05:32:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:32:40,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:32:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:40,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:32:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:40,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:32:40,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265637529] [2022-04-06 05:32:40,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265637529] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:32:40,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295367352] [2022-04-06 05:32:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:32:40,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:32:40,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:32:40,872 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) [2022-04-06 05:32:40,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 05:32:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:40,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 05:32:40,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:32:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:41,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:32:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:32:41,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295367352] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 05:32:41,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:32:41,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 16 [2022-04-06 05:32:41,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786957096] [2022-04-06 05:32:41,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:32:41,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:32:41,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:32:41,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:32:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 05:32:41,367 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-04-06 05:32:43,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:45,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:47,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:32:47,921 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-04-06 05:32:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:32:47,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-04-06 05:32:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:32:47,922 INFO L225 Difference]: With dead ends: 25 [2022-04-06 05:32:47,922 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 05:32:47,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 05:32:47,923 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-04-06 05:32:47,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-04-06 05:32:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 05:32:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-06 05:32:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:32:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-04-06 05:32:47,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2022-04-06 05:32:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:32:47,926 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-04-06 05:32:47,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-04-06 05:32:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-04-06 05:32:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 05:32:47,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:32:47,927 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:32:47,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 05:32:48,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:32:48,127 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:32:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:32:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1493554663, now seen corresponding path program 1 times [2022-04-06 05:32:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:32:48,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253519191] [2022-04-06 05:32:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:32:48,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:32:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:48,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:32:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:48,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:32:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253519191] [2022-04-06 05:32:48,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253519191] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:32:48,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:32:48,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 05:32:48,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708321990] [2022-04-06 05:32:48,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:32:48,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 05:32:48,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:32:48,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 05:32:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-06 05:32:48,342 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:32:50,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:52,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:32:52,807 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-04-06 05:32:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:32:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 05:32:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:32:52,808 INFO L225 Difference]: With dead ends: 24 [2022-04-06 05:32:52,808 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 05:32:52,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 05:32:52,808 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 05:32:52,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 28 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 05:32:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 05:32:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 05:32:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:32:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-04-06 05:32:52,812 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2022-04-06 05:32:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:32:52,813 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-04-06 05:32:52,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:32:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-06 05:32:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 05:32:52,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:32:52,813 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:32:52,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 05:32:52,813 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:32:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:32:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1990443884, now seen corresponding path program 1 times [2022-04-06 05:32:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:32:52,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35213266] [2022-04-06 05:32:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:32:52,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:32:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:32:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:52,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:32:52,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35213266] [2022-04-06 05:32:52,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35213266] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:32:52,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024575638] [2022-04-06 05:32:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:32:52,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:32:52,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:32:52,870 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) [2022-04-06 05:32:52,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 05:32:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:52,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 05:32:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:32:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:53,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:32:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 05:32:53,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024575638] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 05:32:53,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:32:53,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-04-06 05:32:53,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733354857] [2022-04-06 05:32:53,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:32:53,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:32:53,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:32:53,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:32:53,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 05:32:53,352 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-04-06 05:32:55,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:57,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:32:59,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:01,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:03,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:05,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:06,220 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-04-06 05:33:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:33:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 19 [2022-04-06 05:33:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:06,221 INFO L225 Difference]: With dead ends: 31 [2022-04-06 05:33:06,221 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 05:33:06,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 05:33:06,222 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:06,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 6 Unknown, 0 Unchecked, 12.9s Time] [2022-04-06 05:33:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 05:33:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-04-06 05:33:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:33:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-04-06 05:33:06,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2022-04-06 05:33:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:06,225 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-04-06 05:33:06,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-04-06 05:33:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-04-06 05:33:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 05:33:06,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:06,225 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:33:06,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:06,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:06,432 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash 509577165, now seen corresponding path program 1 times [2022-04-06 05:33:06,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:06,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477296699] [2022-04-06 05:33:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:06,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:06,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:33:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:06,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:06,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477296699] [2022-04-06 05:33:06,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477296699] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:33:06,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752651287] [2022-04-06 05:33:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:06,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:06,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:06,724 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) [2022-04-06 05:33:06,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 05:33:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:06,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 05:33:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:07,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:33:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 05:33:07,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752651287] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 05:33:07,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:33:07,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 9] total 20 [2022-04-06 05:33:07,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334007193] [2022-04-06 05:33:07,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:07,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:33:07,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:33:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 05:33:07,365 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-04-06 05:33:09,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:11,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:13,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:13,786 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-04-06 05:33:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:33:13,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 20 [2022-04-06 05:33:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:13,909 INFO L225 Difference]: With dead ends: 32 [2022-04-06 05:33:13,909 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 05:33:13,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-04-06 05:33:13,910 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:13,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time] [2022-04-06 05:33:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 05:33:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-04-06 05:33:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:33:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-04-06 05:33:13,913 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 20 [2022-04-06 05:33:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:13,914 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-04-06 05:33:13,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-04-06 05:33:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-04-06 05:33:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 05:33:13,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:13,914 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:33:13,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:14,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:14,117 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:14,117 INFO L85 PathProgramCache]: Analyzing trace with hash 843369465, now seen corresponding path program 1 times [2022-04-06 05:33:14,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:14,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026687040] [2022-04-06 05:33:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:14,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:14,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:33:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:14,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:14,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026687040] [2022-04-06 05:33:14,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026687040] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:33:14,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788949594] [2022-04-06 05:33:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:14,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:14,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:14,173 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) [2022-04-06 05:33:14,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 05:33:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:14,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 05:33:14,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:14,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:33:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 05:33:14,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788949594] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 05:33:14,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:33:14,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-04-06 05:33:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909860508] [2022-04-06 05:33:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:14,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:33:14,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:33:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-06 05:33:14,615 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-04-06 05:33:16,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:18,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:20,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:21,228 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2022-04-06 05:33:21,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:33:21,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 21 [2022-04-06 05:33:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:21,229 INFO L225 Difference]: With dead ends: 39 [2022-04-06 05:33:21,230 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 05:33:21,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-04-06 05:33:21,230 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:21,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-04-06 05:33:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 05:33:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 05:33:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 05:33:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2022-04-06 05:33:21,234 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 21 [2022-04-06 05:33:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:21,234 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2022-04-06 05:33:21,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-04-06 05:33:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2022-04-06 05:33:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 05:33:21,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:21,235 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:33:21,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:21,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:21,436 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash 292028624, now seen corresponding path program 1 times [2022-04-06 05:33:21,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:21,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020027212] [2022-04-06 05:33:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:21,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:21,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:33:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020027212] [2022-04-06 05:33:21,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020027212] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:33:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649461486] [2022-04-06 05:33:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:21,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:21,697 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) [2022-04-06 05:33:21,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 05:33:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 05:33:21,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:22,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:33:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 05:33:22,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649461486] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 05:33:22,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:33:22,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 11] total 23 [2022-04-06 05:33:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658587019] [2022-04-06 05:33:22,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:22,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:33:22,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:22,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:33:22,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-04-06 05:33:22,480 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2022-04-06 05:33:24,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:26,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 05:33:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:27,016 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2022-04-06 05:33:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:33:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 [2022-04-06 05:33:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:27,017 INFO L225 Difference]: With dead ends: 34 [2022-04-06 05:33:27,017 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 05:33:27,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-04-06 05:33:27,018 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:27,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 05:33:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 05:33:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 05:33:27,018 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) [2022-04-06 05:33:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 05:33:27,018 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-04-06 05:33:27,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:27,019 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 05:33:27,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2022-04-06 05:33:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 05:33:27,019 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 05:33:27,021 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 05:33:27,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:27,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:27,226 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:33:27,227 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 05:33:27,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:33:27 BasicIcfg [2022-04-06 05:33:27,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 05:33:27,236 INFO L158 Benchmark]: Toolchain (without parser) took 56720.11ms. Allocated memory was 204.5MB in the beginning and 254.8MB in the end (delta: 50.3MB). Free memory was 149.7MB in the beginning and 90.0MB in the end (delta: 59.7MB). Peak memory consumption was 110.1MB. Max. memory is 8.0GB. [2022-04-06 05:33:27,236 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 204.5MB. Free memory is still 165.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 05:33:27,236 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.96ms. Allocated memory was 204.5MB in the beginning and 254.8MB in the end (delta: 50.3MB). Free memory was 149.6MB in the beginning and 228.0MB in the end (delta: -78.5MB). Peak memory consumption was 7.1MB. Max. memory is 8.0GB. [2022-04-06 05:33:27,236 INFO L158 Benchmark]: Boogie Preprocessor took 31.84ms. Allocated memory is still 254.8MB. Free memory was 228.0MB in the beginning and 227.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 05:33:27,237 INFO L158 Benchmark]: RCFGBuilder took 4619.44ms. Allocated memory is still 254.8MB. Free memory was 227.0MB in the beginning and 214.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 05:33:27,237 INFO L158 Benchmark]: IcfgTransformer took 16.91ms. Allocated memory is still 254.8MB. Free memory was 214.4MB in the beginning and 213.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 05:33:27,237 INFO L158 Benchmark]: TraceAbstraction took 51874.43ms. Allocated memory is still 254.8MB. Free memory was 212.8MB in the beginning and 90.0MB in the end (delta: 122.9MB). Peak memory consumption was 123.9MB. Max. memory is 8.0GB. [2022-04-06 05:33:27,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 204.5MB. Free memory is still 165.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 170.96ms. Allocated memory was 204.5MB in the beginning and 254.8MB in the end (delta: 50.3MB). Free memory was 149.6MB in the beginning and 228.0MB in the end (delta: -78.5MB). Peak memory consumption was 7.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.84ms. Allocated memory is still 254.8MB. Free memory was 228.0MB in the beginning and 227.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 4619.44ms. Allocated memory is still 254.8MB. Free memory was 227.0MB in the beginning and 214.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 16.91ms. Allocated memory is still 254.8MB. Free memory was 214.4MB in the beginning and 213.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 51874.43ms. Allocated memory is still 254.8MB. Free memory was 212.8MB in the beginning and 90.0MB in the end (delta: 122.9MB). Peak memory consumption was 123.9MB. 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: 10]: 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, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 51.8s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 46.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 20 mSolverCounterUnknown, 88 SdHoareTripleChecker+Valid, 45.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 87 mSDsluCounter, 326 SdHoareTripleChecker+Invalid, 42.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 207 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 323 IncrementalHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 119 mSDtfsCounter, 323 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 275 GetRequests, 163 SyntacticMatches, 15 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=7, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 242 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 325 ConstructedInterpolants, 0 QuantifiedInterpolants, 3411 SizeOfPredicates, 5 NumberOfNonLiveVariables, 441 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 37/91 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! [2022-04-06 05:33:27,256 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...