/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/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 14:41:06,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 14:41:06,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 14:41:06,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 14:41:06,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 14:41:06,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 14:41:06,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 14:41:06,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 14:41:06,663 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 14:41:06,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 14:41:06,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 14:41:06,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 14:41:06,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 14:41:06,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 14:41:06,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 14:41:06,664 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 14:41:06,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 14:41:06,665 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 14:41:06,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 14:41:06,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 14:41:06,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 14:41:06,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 14:41:06,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 14:41:06,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:41:06,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 14:41:06,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 14:41:06,672 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 14:41:06,673 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 14:41:06,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 14:41:06,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 14:41:06,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 14:41:06,895 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 14:41:06,895 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 14:41:06,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-1.i [2022-03-17 14:41:06,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0e7ab235/7c267dbed5174c63af00e40f2a99f960/FLAG2852a5707 [2022-03-17 14:41:07,364 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 14:41:07,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i [2022-03-17 14:41:07,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0e7ab235/7c267dbed5174c63af00e40f2a99f960/FLAG2852a5707 [2022-03-17 14:41:07,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0e7ab235/7c267dbed5174c63af00e40f2a99f960 [2022-03-17 14:41:07,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 14:41:07,392 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 14:41:07,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 14:41:07,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 14:41:07,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 14:41:07,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba38ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07, skipping insertion in model container [2022-03-17 14:41:07,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 14:41:07,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 14:41:07,546 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/sum03-1.i[807,820] [2022-03-17 14:41:07,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:41:07,565 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 14:41:07,573 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/sum03-1.i[807,820] [2022-03-17 14:41:07,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:41:07,594 INFO L208 MainTranslator]: Completed translation [2022-03-17 14:41:07,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07 WrapperNode [2022-03-17 14:41:07,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 14:41:07,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 14:41:07,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 14:41:07,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 14:41:07,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 14:41:07,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 14:41:07,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 14:41:07,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 14:41:07,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:41:07,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:41:07,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 14:41:07,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 14:41:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 14:41:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 14:41:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 14:41:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 14:41:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 14:41:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 14:41:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 14:41:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 14:41:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 14:41:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 14:41:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 14:41:07,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 14:41:07,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 14:41:07,718 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 14:41:07,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 14:41:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 14:41:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 14:41:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 14:41:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 14:41:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 14:41:07,784 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 14:41:07,785 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 14:41:07,864 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 14:41:07,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 14:41:07,868 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 14:41:07,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:41:07 BoogieIcfgContainer [2022-03-17 14:41:07,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 14:41:07,871 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 14:41:07,871 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 14:41:07,872 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 14:41:07,875 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:41:07" (1/1) ... [2022-03-17 14:41:07,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:41:07 BasicIcfg [2022-03-17 14:41:07,888 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 14:41:07,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 14:41:07,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 14:41:07,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 14:41:07,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:41:07" (1/4) ... [2022-03-17 14:41:07,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ea678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:41:07, skipping insertion in model container [2022-03-17 14:41:07,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:41:07" (2/4) ... [2022-03-17 14:41:07,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ea678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:41:07, skipping insertion in model container [2022-03-17 14:41:07,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:41:07" (3/4) ... [2022-03-17 14:41:07,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ea678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:41:07, skipping insertion in model container [2022-03-17 14:41:07,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:41:07" (4/4) ... [2022-03-17 14:41:07,906 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-1.iJordan [2022-03-17 14:41:07,910 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 14:41:07,910 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 14:41:07,975 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 14:41:07,986 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 14:41:07,987 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 14:41:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 14:41:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 14:41:08,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:41:08,003 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:41:08,004 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:41:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:41:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1546198667, now seen corresponding path program 1 times [2022-03-17 14:41:08,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:41:08,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89738504] [2022-03-17 14:41:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:08,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:41:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:08,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:41:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:41:08,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:41:08,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89738504] [2022-03-17 14:41:08,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89738504] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:41:08,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:41:08,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 14:41:08,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665947640] [2022-03-17 14:41:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:41:08,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 14:41:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:41:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 14:41:08,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-17 14:41:08,508 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 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 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:41:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:41:08,704 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-03-17 14:41:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 14:41:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 14:41:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:41:08,714 INFO L225 Difference]: With dead ends: 27 [2022-03-17 14:41:08,714 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 14:41:08,717 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 14:41:08,723 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:41:08,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:41:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 14:41:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-03-17 14:41:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 14:41:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-03-17 14:41:08,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2022-03-17 14:41:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:41:08,760 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-03-17 14:41:08,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:41:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-03-17 14:41:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 14:41:08,762 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:41:08,762 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:41:08,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 14:41:08,763 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:41:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:41:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 35168483, now seen corresponding path program 1 times [2022-03-17 14:41:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:41:08,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492148205] [2022-03-17 14:41:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:08,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:41:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:08,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:41:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:09,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-17 14:41:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:41:09,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:41:09,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492148205] [2022-03-17 14:41:09,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492148205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:41:09,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73958013] [2022-03-17 14:41:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:09,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:41:09,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:41:09,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:41:09,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 14:41:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:09,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 14:41:09,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:41:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:41:09,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:41:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:41:10,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73958013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:41:10,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:41:10,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-03-17 14:41:10,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758560551] [2022-03-17 14:41:10,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:41:10,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 14:41:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:41:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 14:41:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-17 14:41:10,074 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 14:41:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:41:10,447 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-17 14:41:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 14:41:10,448 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-03-17 14:41:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:41:10,450 INFO L225 Difference]: With dead ends: 39 [2022-03-17 14:41:10,450 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 14:41:10,451 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-03-17 14:41:10,451 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:41:10,452 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:41:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 14:41:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-03-17 14:41:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 14:41:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-17 14:41:10,462 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 21 [2022-03-17 14:41:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:41:10,463 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-17 14:41:10,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 14:41:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-17 14:41:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 14:41:10,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:41:10,465 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:41:10,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 14:41:10,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:41:10,668 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:41:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:41:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash -407833038, now seen corresponding path program 1 times [2022-03-17 14:41:10,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:41:10,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615790252] [2022-03-17 14:41:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:10,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:41:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:10,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:41:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:10,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-17 14:41:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:10,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:41:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:10,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-17 14:41:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 14:41:10,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:41:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615790252] [2022-03-17 14:41:10,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615790252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:41:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730798999] [2022-03-17 14:41:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:10,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:41:10,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:41:10,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:41:10,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 14:41:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 14:41:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:41:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 14:41:10,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:41:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 14:41:11,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730798999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:41:11,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:41:11,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-17 14:41:11,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451612366] [2022-03-17 14:41:11,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:41:11,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 14:41:11,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:41:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 14:41:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-03-17 14:41:11,073 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 14:41:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:41:11,396 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-03-17 14:41:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 14:41:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37 [2022-03-17 14:41:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:41:11,398 INFO L225 Difference]: With dead ends: 59 [2022-03-17 14:41:11,398 INFO L226 Difference]: Without dead ends: 59 [2022-03-17 14:41:11,398 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2022-03-17 14:41:11,399 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:41:11,400 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 51 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:41:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-17 14:41:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-17 14:41:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 14:41:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-17 14:41:11,411 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 37 [2022-03-17 14:41:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:41:11,411 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-17 14:41:11,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 14:41:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-17 14:41:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 14:41:11,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:41:11,416 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:41:11,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 14:41:11,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 14:41:11,636 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:41:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:41:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 562981354, now seen corresponding path program 2 times [2022-03-17 14:41:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:41:11,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847943509] [2022-03-17 14:41:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:11,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:41:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:41:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-17 14:41:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:41:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-17 14:41:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 14:41:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-17 14:41:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-17 14:41:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-17 14:41:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-17 14:41:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 14:41:11,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:41:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847943509] [2022-03-17 14:41:11,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847943509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:41:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209042090] [2022-03-17 14:41:11,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 14:41:11,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:41:11,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:41:11,886 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:41:11,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 14:41:11,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 14:41:11,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:41:11,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 14:41:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:41:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 14:41:12,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:41:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 14:41:12,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209042090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:41:12,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:41:12,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-17 14:41:12,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250704991] [2022-03-17 14:41:12,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:41:12,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 14:41:12,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:41:12,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 14:41:12,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-17 14:41:12,535 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 14:41:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:41:12,988 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2022-03-17 14:41:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 14:41:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 77 [2022-03-17 14:41:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:41:12,990 INFO L225 Difference]: With dead ends: 67 [2022-03-17 14:41:12,991 INFO L226 Difference]: Without dead ends: 67 [2022-03-17 14:41:12,991 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2022-03-17 14:41:12,992 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 14:41:12,992 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 76 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 14:41:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-17 14:41:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-17 14:41:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 14:41:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-03-17 14:41:13,000 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 77 [2022-03-17 14:41:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:41:13,001 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-03-17 14:41:13,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 14:41:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-03-17 14:41:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 14:41:13,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:41:13,002 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:41:13,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 14:41:13,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:41:13,225 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:41:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:41:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1970006374, now seen corresponding path program 3 times [2022-03-17 14:41:13,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:41:13,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855730588] [2022-03-17 14:41:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:13,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:41:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 14:41:13,323 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 14:41:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 14:41:13,397 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 14:41:13,397 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 14:41:13,398 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 14:41:13,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-17 14:41:13,405 INFO L718 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-03-17 14:41:13,408 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 14:41:13,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:41:13 BasicIcfg [2022-03-17 14:41:13,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 14:41:13,460 INFO L158 Benchmark]: Toolchain (without parser) took 6067.37ms. Allocated memory was 177.2MB in the beginning and 248.5MB in the end (delta: 71.3MB). Free memory was 122.1MB in the beginning and 151.6MB in the end (delta: -29.5MB). Peak memory consumption was 42.7MB. Max. memory is 8.0GB. [2022-03-17 14:41:13,460 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory is still 138.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 14:41:13,460 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.04ms. Allocated memory was 177.2MB in the beginning and 248.5MB in the end (delta: 71.3MB). Free memory was 121.9MB in the beginning and 223.1MB in the end (delta: -101.2MB). Peak memory consumption was 15.9MB. Max. memory is 8.0GB. [2022-03-17 14:41:13,460 INFO L158 Benchmark]: Boogie Preprocessor took 40.91ms. Allocated memory is still 248.5MB. Free memory was 223.1MB in the beginning and 221.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 14:41:13,461 INFO L158 Benchmark]: RCFGBuilder took 234.05ms. Allocated memory is still 248.5MB. Free memory was 221.0MB in the beginning and 210.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 14:41:13,461 INFO L158 Benchmark]: IcfgTransformer took 17.32ms. Allocated memory is still 248.5MB. Free memory was 210.5MB in the beginning and 209.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 14:41:13,461 INFO L158 Benchmark]: TraceAbstraction took 5557.89ms. Allocated memory is still 248.5MB. Free memory was 208.9MB in the beginning and 151.6MB in the end (delta: 57.3MB). Peak memory consumption was 57.9MB. Max. memory is 8.0GB. [2022-03-17 14:41:13,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory is still 138.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 200.04ms. Allocated memory was 177.2MB in the beginning and 248.5MB in the end (delta: 71.3MB). Free memory was 121.9MB in the beginning and 223.1MB in the end (delta: -101.2MB). Peak memory consumption was 15.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.91ms. Allocated memory is still 248.5MB. Free memory was 223.1MB in the beginning and 221.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 234.05ms. Allocated memory is still 248.5MB. Free memory was 221.0MB in the beginning and 210.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.32ms. Allocated memory is still 248.5MB. Free memory was 210.5MB in the beginning and 209.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 5557.89ms. Allocated memory is still 248.5MB. Free memory was 208.9MB in the beginning and 151.6MB in the end (delta: 57.3MB). Peak memory consumption was 57.9MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int sn=0; [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L23] unsigned int x=0; VAL [loop1=50, n1=51, sn=0, x=0] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=0, x=0] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=2, x=0] [L28] x++ VAL [loop1=50, n1=51, sn=2, x=1] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=2, x=1] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=2, x=1] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=4, x=1] [L28] x++ VAL [loop1=50, n1=51, sn=4, x=2] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=4, x=2] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=4, x=2] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=6, x=2] [L28] x++ VAL [loop1=50, n1=51, sn=6, x=3] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=6, x=3] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=6, x=3] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=8, x=3] [L28] x++ VAL [loop1=50, n1=51, sn=8, x=4] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=8, x=4] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=8, x=4] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=10, x=4] [L28] x++ VAL [loop1=50, n1=51, sn=10, x=5] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=10, x=5] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=10, x=5] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=12, x=5] [L28] x++ VAL [loop1=50, n1=51, sn=12, x=6] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=12, x=6] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=12, x=6] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=14, x=6] [L28] x++ VAL [loop1=50, n1=51, sn=14, x=7] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=14, x=7] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=14, x=7] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=16, x=7] [L28] x++ VAL [loop1=50, n1=51, sn=16, x=8] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=16, x=8] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=16, x=8] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=18, x=8] [L28] x++ VAL [loop1=50, n1=51, sn=18, x=9] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=18, x=9] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=18, x=9] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=20, x=9] [L28] x++ VAL [loop1=50, n1=51, sn=20, x=10] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=20, x=10] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=20, x=10] [L25] COND FALSE !(x<10) VAL [loop1=50, n1=51, sn=20, x=10] [L28] x++ VAL [loop1=50, n1=51, sn=20, x=11] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=0] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L15] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 5, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 150 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 146 mSDsluCounter, 221 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 148 mSDsCounter, 125 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 893 IncrementalHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 125 mSolverCounterUnsat, 73 mSDtfsCounter, 893 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 368 GetRequests, 274 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=4, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 376 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 1670 SizeOfPredicates, 6 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 510/960 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-17 14:41:13,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...