/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:46:54,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:46:54,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:46:54,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 20:46:54,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:46:54,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:46:54,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:46:54,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:46:54,937 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:46:54,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:46:54,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:46:54,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:46:54,940 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:46:54,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:46:54,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:46:54,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:46:54,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:46:54,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:46:54,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:46:54,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:46:54,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:46:54,941 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:46:54,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:46:55,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:46:55,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:46:55,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:46:55,164 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:46:55,179 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:46:55,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-02-14 20:46:55,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cc728756/7a8425f315724eb99f520a80422b55a3/FLAG5e26acc50 [2022-02-14 20:46:55,579 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:46:55,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-02-14 20:46:55,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cc728756/7a8425f315724eb99f520a80422b55a3/FLAG5e26acc50 [2022-02-14 20:46:55,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cc728756/7a8425f315724eb99f520a80422b55a3 [2022-02-14 20:46:55,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:46:55,594 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:46:55,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:46:55,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:46:55,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:46:55,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9cab7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55, skipping insertion in model container [2022-02-14 20:46:55,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:46:55,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:46:55,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-02-14 20:46:55,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:46:55,742 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:46:55,752 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-02-14 20:46:55,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:46:55,768 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:46:55,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55 WrapperNode [2022-02-14 20:46:55,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:46:55,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:46:55,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:46:55,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:46:55,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:46:55,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:46:55,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:46:55,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:46:55,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:46:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:46:55,829 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) [2022-02-14 20:46:55,846 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 [2022-02-14 20:46:55,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:46:55,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:46:55,859 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:46:55,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:46:55,859 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-02-14 20:46:55,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:46:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:46:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:46:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:46:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:46:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:46:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-02-14 20:46:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:46:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:46:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:46:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:46:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:46:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:46:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:46:55,911 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:46:55,912 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:46:55,981 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:46:55,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:46:55,985 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 20:46:55,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:46:55 BoogieIcfgContainer [2022-02-14 20:46:55,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:46:55,987 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:46:55,987 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:46:55,988 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:46:55,990 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:46:55" (1/1) ... [2022-02-14 20:46:55,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:46:55 BasicIcfg [2022-02-14 20:46:55,999 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:46:56,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:46:56,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:46:56,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:46:56,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:46:55" (1/4) ... [2022-02-14 20:46:56,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217a1826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:46:56, skipping insertion in model container [2022-02-14 20:46:56,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:46:55" (2/4) ... [2022-02-14 20:46:56,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217a1826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:46:56, skipping insertion in model container [2022-02-14 20:46:56,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:46:55" (3/4) ... [2022-02-14 20:46:56,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217a1826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:46:56, skipping insertion in model container [2022-02-14 20:46:56,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:46:55" (4/4) ... [2022-02-14 20:46:56,004 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.cJordan [2022-02-14 20:46:56,007 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:46:56,008 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:46:56,034 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:46:56,038 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 20:46:56,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:46:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 20:46:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 20:46:56,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:46:56,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:46:56,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:46:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:46:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1565505021, now seen corresponding path program 1 times [2022-02-14 20:46:56,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:46:56,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304160058] [2022-02-14 20:46:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:46:56,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:46:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:46:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:46:56,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:46:56,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304160058] [2022-02-14 20:46:56,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304160058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:46:56,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:46:56,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 20:46:56,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119236989] [2022-02-14 20:46:56,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:46:56,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 20:46:56,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:46:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 20:46:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:46:56,271 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-14 20:46:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:46:56,297 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-02-14 20:46:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 20:46:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-02-14 20:46:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:46:56,305 INFO L225 Difference]: With dead ends: 23 [2022-02-14 20:46:56,305 INFO L226 Difference]: Without dead ends: 17 [2022-02-14 20:46:56,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:46:56,309 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:46:56,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:46:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-14 20:46:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-14 20:46:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:46:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-02-14 20:46:56,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2022-02-14 20:46:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:46:56,330 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-02-14 20:46:56,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-14 20:46:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-02-14 20:46:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 20:46:56,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:46:56,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:46:56,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:46:56,331 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:46:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:46:56,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1564581500, now seen corresponding path program 1 times [2022-02-14 20:46:56,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:46:56,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011999398] [2022-02-14 20:46:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:46:56,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:46:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:56,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:46:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:46:56,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:46:56,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011999398] [2022-02-14 20:46:56,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011999398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:46:56,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:46:56,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:46:56,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491073914] [2022-02-14 20:46:56,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:46:56,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:46:56,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:46:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:46:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:46:56,414 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-14 20:46:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:46:56,451 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-02-14 20:46:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 20:46:56,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-02-14 20:46:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:46:56,453 INFO L225 Difference]: With dead ends: 20 [2022-02-14 20:46:56,453 INFO L226 Difference]: Without dead ends: 20 [2022-02-14 20:46:56,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 20:46:56,454 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:46:56,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:46:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-14 20:46:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-02-14 20:46:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:46:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-02-14 20:46:56,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-02-14 20:46:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:46:56,460 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-02-14 20:46:56,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-14 20:46:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-02-14 20:46:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 20:46:56,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:46:56,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:46:56,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:46:56,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:46:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:46:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1890585047, now seen corresponding path program 1 times [2022-02-14 20:46:56,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:46:56,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259658376] [2022-02-14 20:46:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:46:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:46:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:56,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:46:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:56,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:46:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:46:56,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:46:56,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259658376] [2022-02-14 20:46:56,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259658376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:46:56,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901799341] [2022-02-14 20:46:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:46:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:46:56,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:46:56,576 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) [2022-02-14 20:46:56,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 20:46:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 20:46:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:46:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:46:56,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:46:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:46:56,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901799341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:46:56,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:46:56,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-02-14 20:46:56,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544853943] [2022-02-14 20:46:56,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:46:56,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 20:46:56,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:46:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 20:46:56,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-14 20:46:56,841 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:46:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:46:56,950 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-02-14 20:46:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 20:46:56,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 17 [2022-02-14 20:46:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:46:56,951 INFO L225 Difference]: With dead ends: 24 [2022-02-14 20:46:56,951 INFO L226 Difference]: Without dead ends: 24 [2022-02-14 20:46:56,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-02-14 20:46:56,953 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:46:56,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:46:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-14 20:46:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-14 20:46:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 20:46:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-02-14 20:46:56,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-02-14 20:46:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:46:56,957 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-02-14 20:46:56,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:46:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-02-14 20:46:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 20:46:56,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:46:56,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:46:56,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 20:46:57,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:46:57,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:46:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:46:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1393393715, now seen corresponding path program 2 times [2022-02-14 20:46:57,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:46:57,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028765478] [2022-02-14 20:46:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:46:57,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:46:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:57,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:46:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:57,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:46:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:57,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:46:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:57,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 20:46:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-14 20:46:57,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:46:57,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028765478] [2022-02-14 20:46:57,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028765478] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:46:57,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031269379] [2022-02-14 20:46:57,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:46:57,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:46:57,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:46:57,444 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) [2022-02-14 20:46:57,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:46:57,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:46:57,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:46:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-14 20:46:57,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:46:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-02-14 20:46:57,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:46:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 20:46:57,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031269379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:46:57,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:46:57,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 22 [2022-02-14 20:46:57,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810438798] [2022-02-14 20:46:57,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:46:57,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 20:46:57,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:46:57,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 20:46:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-14 20:46:57,843 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 20:46:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:46:58,270 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-02-14 20:46:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 20:46:58,270 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 29 [2022-02-14 20:46:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:46:58,271 INFO L225 Difference]: With dead ends: 36 [2022-02-14 20:46:58,271 INFO L226 Difference]: Without dead ends: 36 [2022-02-14 20:46:58,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-02-14 20:46:58,272 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:46:58,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:46:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-14 20:46:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-14 20:46:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 20:46:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-02-14 20:46:58,277 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 29 [2022-02-14 20:46:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:46:58,277 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-02-14 20:46:58,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 20:46:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-02-14 20:46:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-14 20:46:58,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:46:58,279 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:46:58,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 20:46:58,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 20:46:58,492 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:46:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:46:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash 638375751, now seen corresponding path program 3 times [2022-02-14 20:46:58,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:46:58,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112890004] [2022-02-14 20:46:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:46:58,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:46:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:46:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:46:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:46:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 20:46:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 20:46:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 20:46:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 20:46:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 20:46:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:46:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-02-14 20:46:58,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:46:58,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112890004] [2022-02-14 20:46:58,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112890004] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:46:58,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855505573] [2022-02-14 20:46:58,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:46:58,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:46:58,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:46:58,778 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) [2022-02-14 20:46:58,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 20:46:58,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-14 20:46:58,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:46:58,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-02-14 20:46:58,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:46:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-02-14 20:46:59,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:46:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-02-14 20:46:59,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855505573] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:46:59,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:46:59,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 42 [2022-02-14 20:46:59,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139464184] [2022-02-14 20:46:59,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:46:59,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-14 20:46:59,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:46:59,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-14 20:46:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2022-02-14 20:46:59,802 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 20:47:04,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:47:04,086 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-02-14 20:47:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-14 20:47:04,086 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 53 [2022-02-14 20:47:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:47:04,087 INFO L225 Difference]: With dead ends: 60 [2022-02-14 20:47:04,087 INFO L226 Difference]: Without dead ends: 60 [2022-02-14 20:47:04,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=845, Invalid=4267, Unknown=0, NotChecked=0, Total=5112 [2022-02-14 20:47:04,089 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 20:47:04,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 148 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 20:47:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-14 20:47:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-14 20:47:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 18 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 20:47:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-02-14 20:47:04,098 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 53 [2022-02-14 20:47:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:47:04,098 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-02-14 20:47:04,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 20:47:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-02-14 20:47:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-14 20:47:04,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:47:04,102 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:47:04,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-14 20:47:04,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:47:04,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:47:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:47:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1561497967, now seen corresponding path program 4 times [2022-02-14 20:47:04,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:47:04,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709047949] [2022-02-14 20:47:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:47:04,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:47:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:47:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:47:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:47:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 20:47:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 20:47:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 20:47:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 20:47:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 20:47:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 20:47:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 20:47:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 20:47:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 20:47:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 20:47:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 20:47:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 20:47:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 20:47:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:47:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-02-14 20:47:04,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:47:04,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709047949] [2022-02-14 20:47:04,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709047949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:47:04,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092759490] [2022-02-14 20:47:04,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 20:47:04,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:47:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:47:04,974 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) [2022-02-14 20:47:04,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 20:47:05,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 20:47:05,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:47:05,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 153 conjunts are in the unsatisfiable core [2022-02-14 20:47:05,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:47:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-02-14 20:47:05,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:47:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-02-14 20:47:08,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092759490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:47:08,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:47:08,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 48] total 82 [2022-02-14 20:47:08,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680911512] [2022-02-14 20:47:08,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:47:08,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-14 20:47:08,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:47:08,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-14 20:47:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=5953, Unknown=0, NotChecked=0, Total=6642 [2022-02-14 20:47:08,143 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-14 20:47:42,649 WARN L228 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 110 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 20:49:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:32,271 INFO L93 Difference]: Finished difference Result 108 states and 138 transitions. [2022-02-14 20:49:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-14 20:49:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 101 [2022-02-14 20:49:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:32,273 INFO L225 Difference]: With dead ends: 108 [2022-02-14 20:49:32,273 INFO L226 Difference]: Without dead ends: 108 [2022-02-14 20:49:32,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 172 SyntacticMatches, 15 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 144.7s TimeCoverageRelationStatistics Valid=3099, Invalid=17490, Unknown=3, NotChecked=0, Total=20592 [2022-02-14 20:49:32,277 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3835 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 3835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:32,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 266 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 3835 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-14 20:49:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-14 20:49:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-02-14 20:49:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 34 states have call successors, (34), 4 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 20:49:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2022-02-14 20:49:32,287 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 101 [2022-02-14 20:49:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:32,288 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2022-02-14 20:49:32,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-14 20:49:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2022-02-14 20:49:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-02-14 20:49:32,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:32,290 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:32,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 20:49:32,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:49:32,491 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:32,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1223308735, now seen corresponding path program 5 times [2022-02-14 20:49:32,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:32,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486919183] [2022-02-14 20:49:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:32,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 20:49:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-14 20:49:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 20:49:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 20:49:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 20:49:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 20:49:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 20:49:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 20:49:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 20:49:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 20:49:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 20:49:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 20:49:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 20:49:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 20:49:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 20:49:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 20:49:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 20:49:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-14 20:49:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-02-14 20:49:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-02-14 20:49:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 20:49:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-02-14 20:49:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-02-14 20:49:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-02-14 20:49:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-02-14 20:49:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-02-14 20:49:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-02-14 20:49:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-02-14 20:49:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-02-14 20:49:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-02-14 20:49:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-02-14 20:49:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-02-14 20:49:34,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:34,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486919183] [2022-02-14 20:49:34,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486919183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:49:34,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248178734] [2022-02-14 20:49:34,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 20:49:34,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:49:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:49:34,498 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) [2022-02-14 20:49:34,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 20:49:49,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-02-14 20:49:49,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:49:49,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 313 conjunts are in the unsatisfiable core [2022-02-14 20:49:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:49:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-02-14 20:49:51,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:49:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-02-14 20:49:59,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248178734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:49:59,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:49:59,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 96] total 162 [2022-02-14 20:49:59,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784369503] [2022-02-14 20:49:59,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:49:59,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-02-14 20:49:59,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:59,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-02-14 20:49:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2401, Invalid=23681, Unknown=0, NotChecked=0, Total=26082 [2022-02-14 20:49:59,759 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 162 states, 162 states have (on average 1.2345679012345678) internal successors, (200), 99 states have internal predecessors, (200), 64 states have call successors, (66), 3 states have call predecessors, (66), 33 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-02-14 20:51:25,949 WARN L228 SmtUtils]: Spent 10.71s on a formula simplification. DAG size of input: 136 DAG size of output: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 20:52:47,825 WARN L228 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 132 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 20:52:50,042 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ 16 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ c_main_~x~0 24) 4294967296) 268435455) (< (mod (+ 20 c_main_~x~0) 4294967296) 268435455) (= |c_#NULL.base| |c_old(#NULL.base)|) (< (mod (+ 6 c_main_~x~0) 4294967296) 268435455) (< (mod (+ c_main_~x~0 54) 4294967296) 268435455) (< (mod (+ 52 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 50) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 10) 4294967296) 268435455) (< (mod (+ 14 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 52 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 48 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 42 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 38 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 56 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 12) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 38) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 28) 4294967296) 268435455) (< (mod (+ 4 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 20) 4294967296) 268435455) (< (mod (+ 34 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 2 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 24) 4294967296) 268435455) (< (mod (+ 34 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 26) 4294967296) 268435455) (< (mod (+ 58 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 46 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod c_main_~x~0 4294967296) 268435455) (< (mod (+ 30 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 18 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 40 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 28 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 32 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 18) 4294967296) 268435455) (< (mod (+ 56 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 42 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 2 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 14 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 36) 4294967296) 268435455) (< (mod (+ 32 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 44 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 16 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 4) 4294967296) 268435455) (< (mod (+ 60 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 48) 4294967296) 268435455) (< (mod (+ 8 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 30 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 26 c_main_~x~0) 4294967296) 268435455) (< (mod (+ c_main_~x~0 50) 4294967296) 268435455) (< (mod (+ 46 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 10 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 40 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 58) 4294967296) 268435455) (< (mod (+ 6 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 12 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 54) 4294967296) 268435455) (< (mod |c_main_#t~ret4| 4294967296) 268435455) (< (mod (+ 44 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 36 c_main_~x~0) 4294967296) 268435455) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< (mod (+ 22 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 8) 4294967296) 268435455) (< (mod (+ 22 c_main_~x~0) 4294967296) 268435455)) is different from false [2022-02-14 20:54:13,910 WARN L228 SmtUtils]: Spent 9.88s on a formula simplification. DAG size of input: 122 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 20:55:22,908 WARN L228 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 128 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 20:55:25,037 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ 16 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ c_main_~x~0 24) 4294967296) 268435455) (< (mod (+ 20 c_main_~x~0) 4294967296) 268435455) (= |c_#NULL.base| |c_old(#NULL.base)|) (< (mod (+ 6 c_main_~x~0) 4294967296) 268435455) (< (mod (+ c_main_~x~0 54) 4294967296) 268435455) (< (mod (+ 52 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 50) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 10) 4294967296) 268435455) (< (mod (+ 14 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 52 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 48 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 42 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 38 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 56 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 12) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 38) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 28) 4294967296) 268435455) (< (mod (+ 4 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 20) 4294967296) 268435455) (< (mod (+ 34 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 2 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 24) 4294967296) 268435455) (< (mod (+ 34 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 26) 4294967296) 268435455) (< (mod (+ 58 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 46 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod c_main_~x~0 4294967296) 268435455) (< (mod (+ 30 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 18 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 40 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 28 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 32 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 18) 4294967296) 268435455) (< (mod (+ 56 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 42 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 2 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 14 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 36) 4294967296) 268435455) (< (mod (+ 32 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 44 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 16 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 4) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 48) 4294967296) 268435455) (< (mod (+ 8 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 30 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 26 c_main_~x~0) 4294967296) 268435455) (< (mod (+ c_main_~x~0 50) 4294967296) 268435455) (< (mod (+ 46 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 10 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 40 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 6 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 12 c_main_~x~0) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 54) 4294967296) 268435455) (< (mod |c_main_#t~ret4| 4294967296) 268435455) (< (mod (+ 44 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 36 c_main_~x~0) 4294967296) 268435455) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< (mod (+ 22 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 8) 4294967296) 268435455) (< (mod (+ 22 c_main_~x~0) 4294967296) 268435455)) is different from false [2022-02-14 21:00:50,668 WARN L228 SmtUtils]: Spent 24.95s on a formula simplification. DAG size of input: 208 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)