/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 21:15:08,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 21:15:08,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 21:15:08,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 21:15:08,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 21:15:08,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 21:15:08,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 21:15:08,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 21:15:08,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 21:15:08,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 21:15:08,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 21:15:08,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 21:15:08,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 21:15:08,928 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 21:15:08,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 21:15:08,929 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 21:15:08,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 21:15:08,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 21:15:08,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 21:15:08,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 21:15:08,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 21:15:08,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 21:15:08,929 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 21:15:08,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 21:15:08,930 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 21:15:08,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 21:15:08,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 21:15:08,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 21:15:08,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 21:15:08,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:15:08,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 21:15:08,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 21:15:08,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 21:15:08,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 21:15:08,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 21:15:08,931 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 21:15:08,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 21:15:08,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 21:15:08,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 21:15:09,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 21:15:09,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 21:15:09,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 21:15:09,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 21:15:09,145 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 21:15:09,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2022-01-30 21:15:09,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16259105/a652f256a0454f0f951553058728984c/FLAGee867849c [2022-01-30 21:15:09,551 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 21:15:09,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2022-01-30 21:15:09,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16259105/a652f256a0454f0f951553058728984c/FLAGee867849c [2022-01-30 21:15:09,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16259105/a652f256a0454f0f951553058728984c [2022-01-30 21:15:09,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 21:15:09,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 21:15:09,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 21:15:09,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 21:15:09,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 21:15:09,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dcd6e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09, skipping insertion in model container [2022-01-30 21:15:09,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 21:15:09,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 21:15:09,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i[860,873] [2022-01-30 21:15:09,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:15:09,799 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 21:15:09,809 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i[860,873] [2022-01-30 21:15:09,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:15:09,825 INFO L208 MainTranslator]: Completed translation [2022-01-30 21:15:09,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09 WrapperNode [2022-01-30 21:15:09,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 21:15:09,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 21:15:09,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 21:15:09,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 21:15:09,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 21:15:09,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 21:15:09,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 21:15:09,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 21:15:09,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (1/1) ... [2022-01-30 21:15:09,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:15:09,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:09,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 21:15:09,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 21:15:09,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 21:15:09,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 21:15:09,913 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 21:15:09,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 21:15:09,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 21:15:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 21:15:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 21:15:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 21:15:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 21:15:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 21:15:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 21:15:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 21:15:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 21:15:09,968 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 21:15:09,970 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 21:15:10,078 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 21:15:10,083 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 21:15:10,083 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-30 21:15:10,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:15:10 BoogieIcfgContainer [2022-01-30 21:15:10,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 21:15:10,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 21:15:10,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 21:15:10,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 21:15:10,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 09:15:09" (1/3) ... [2022-01-30 21:15:10,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad43c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:15:10, skipping insertion in model container [2022-01-30 21:15:10,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:09" (2/3) ... [2022-01-30 21:15:10,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad43c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:15:10, skipping insertion in model container [2022-01-30 21:15:10,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:15:10" (3/3) ... [2022-01-30 21:15:10,095 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2022-01-30 21:15:10,099 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 21:15:10,100 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 21:15:10,135 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 21:15:10,140 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 21:15:10,140 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 21:15:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 21:15:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-30 21:15:10,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:10,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:10,158 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1568654690, now seen corresponding path program 1 times [2022-01-30 21:15:10,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:10,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42768320] [2022-01-30 21:15:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:10,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:15:10,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:10,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42768320] [2022-01-30 21:15:10,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42768320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:15:10,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:15:10,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 21:15:10,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116940170] [2022-01-30 21:15:10,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:15:10,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:15:10,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:15:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:15:10,422 INFO L87 Difference]: Start difference. First operand has 34 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:10,478 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2022-01-30 21:15:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:15:10,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-01-30 21:15:10,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:10,485 INFO L225 Difference]: With dead ends: 59 [2022-01-30 21:15:10,485 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 21:15:10,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:15:10,493 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 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 [2022-01-30 21:15:10,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:15:10,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 21:15:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-30 21:15:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 21:15:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-30 21:15:10,523 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2022-01-30 21:15:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:10,524 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-30 21:15:10,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-30 21:15:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-30 21:15:10,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:10,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:10,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 21:15:10,525 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1133475219, now seen corresponding path program 1 times [2022-01-30 21:15:10,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:10,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717794877] [2022-01-30 21:15:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:10,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:10,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:15:10,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717794877] [2022-01-30 21:15:10,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717794877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:15:10,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:15:10,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:15:10,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580355828] [2022-01-30 21:15:10,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:15:10,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:15:10,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:15:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 21:15:10,584 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:10,651 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-01-30 21:15:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 21:15:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2022-01-30 21:15:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:10,653 INFO L225 Difference]: With dead ends: 55 [2022-01-30 21:15:10,653 INFO L226 Difference]: Without dead ends: 35 [2022-01-30 21:15:10,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:15:10,655 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:10,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:15:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-30 21:15:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-01-30 21:15:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 21:15:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-01-30 21:15:10,662 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2022-01-30 21:15:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:10,663 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-01-30 21:15:10,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-01-30 21:15:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 21:15:10,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:10,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:10,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 21:15:10,664 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1198767545, now seen corresponding path program 1 times [2022-01-30 21:15:10,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:10,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089890483] [2022-01-30 21:15:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:10,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:10,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:15:10,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:10,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089890483] [2022-01-30 21:15:10,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089890483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:10,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242026591] [2022-01-30 21:15:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:10,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:10,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:10,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:15:10,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 21:15:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:10,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:15:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:15:10,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:15:10,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242026591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:10,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:10,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 21:15:10,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477163662] [2022-01-30 21:15:10,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:10,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 21:15:10,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 21:15:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:15:10,968 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:11,118 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2022-01-30 21:15:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 21:15:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-30 21:15:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:11,119 INFO L225 Difference]: With dead ends: 70 [2022-01-30 21:15:11,119 INFO L226 Difference]: Without dead ends: 49 [2022-01-30 21:15:11,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 21:15:11,126 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:11,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 39 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:15:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-30 21:15:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-30 21:15:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 21:15:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-01-30 21:15:11,149 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 21 [2022-01-30 21:15:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:11,150 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-01-30 21:15:11,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-01-30 21:15:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-30 21:15:11,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:11,151 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:11,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 21:15:11,352 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 [2022-01-30 21:15:11,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash -79288557, now seen corresponding path program 2 times [2022-01-30 21:15:11,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:11,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296051970] [2022-01-30 21:15:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:11,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 21:15:11,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:11,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296051970] [2022-01-30 21:15:11,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296051970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:11,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703092663] [2022-01-30 21:15:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:15:11,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:11,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:15:11,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 21:15:11,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:15:11,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:15:11,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:15:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 21:15:11,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 21:15:11,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703092663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:11,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:11,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-30 21:15:11,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559596885] [2022-01-30 21:15:11,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:11,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 21:15:11,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 21:15:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-30 21:15:11,885 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:12,194 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2022-01-30 21:15:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 21:15:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-30 21:15:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:12,200 INFO L225 Difference]: With dead ends: 115 [2022-01-30 21:15:12,200 INFO L226 Difference]: Without dead ends: 85 [2022-01-30 21:15:12,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-30 21:15:12,202 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:12,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 34 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:15:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-30 21:15:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-01-30 21:15:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 78 states have internal predecessors, (102), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 21:15:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-01-30 21:15:12,221 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 39 [2022-01-30 21:15:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:12,221 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-01-30 21:15:12,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-01-30 21:15:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-30 21:15:12,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:12,223 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:12,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 21:15:12,446 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 [2022-01-30 21:15:12,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash -32609965, now seen corresponding path program 3 times [2022-01-30 21:15:12,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:12,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340225222] [2022-01-30 21:15:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:12,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:12,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:15:12,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340225222] [2022-01-30 21:15:12,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340225222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:12,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798317434] [2022-01-30 21:15:12,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:15:12,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:12,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:12,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:15:12,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 21:15:17,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-30 21:15:17,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:15:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 21:15:17,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:15:17,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-30 21:15:17,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798317434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:17,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:17,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 21:15:17,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437350891] [2022-01-30 21:15:17,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:17,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 21:15:17,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 21:15:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 21:15:17,490 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:18,104 INFO L93 Difference]: Finished difference Result 205 states and 290 transitions. [2022-01-30 21:15:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 21:15:18,105 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-30 21:15:18,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:18,106 INFO L225 Difference]: With dead ends: 205 [2022-01-30 21:15:18,106 INFO L226 Difference]: Without dead ends: 157 [2022-01-30 21:15:18,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 21:15:18,108 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 392 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:18,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 54 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 21:15:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-30 21:15:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-01-30 21:15:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.32) internal successors, (198), 150 states have internal predecessors, (198), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 21:15:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 205 transitions. [2022-01-30 21:15:18,119 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 205 transitions. Word has length 75 [2022-01-30 21:15:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:18,119 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 205 transitions. [2022-01-30 21:15:18,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 205 transitions. [2022-01-30 21:15:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-30 21:15:18,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:18,121 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:18,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 21:15:18,347 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 [2022-01-30 21:15:18,348 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1783504339, now seen corresponding path program 4 times [2022-01-30 21:15:18,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:18,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056181187] [2022-01-30 21:15:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:18,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:18,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:15:18,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056181187] [2022-01-30 21:15:18,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056181187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600034268] [2022-01-30 21:15:18,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 21:15:18,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:18,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:15:18,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 21:23:12,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 21:23:12,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:23:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 21:23:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:23:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:23:12,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:23:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-30 21:23:13,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600034268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:23:13,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:23:13,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-30 21:23:13,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111523308] [2022-01-30 21:23:13,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:23:13,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 21:23:13,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:23:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 21:23:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 21:23:13,639 INFO L87 Difference]: Start difference. First operand 157 states and 205 transitions. Second operand has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:23:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:23:15,290 INFO L93 Difference]: Finished difference Result 385 states and 554 transitions. [2022-01-30 21:23:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 21:23:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-30 21:23:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:23:15,294 INFO L225 Difference]: With dead ends: 385 [2022-01-30 21:23:15,294 INFO L226 Difference]: Without dead ends: 301 [2022-01-30 21:23:15,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-30 21:23:15,299 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1070 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 21:23:15,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 49 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-30 21:23:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-30 21:23:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-01-30 21:23:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 294 states have (on average 1.3265306122448979) internal successors, (390), 294 states have internal predecessors, (390), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 21:23:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 397 transitions. [2022-01-30 21:23:15,337 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 397 transitions. Word has length 147 [2022-01-30 21:23:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:23:15,337 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 397 transitions. [2022-01-30 21:23:15,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:23:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 397 transitions. [2022-01-30 21:23:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-30 21:23:15,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:23:15,349 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:23:15,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 21:23:15,563 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 [2022-01-30 21:23:15,564 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:23:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:23:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash 786056915, now seen corresponding path program 5 times [2022-01-30 21:23:15,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:23:15,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959334256] [2022-01-30 21:23:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:23:15,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:23:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:23:16,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:23:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:23:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-30 21:23:16,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:23:16,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959334256] [2022-01-30 21:23:16,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959334256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:23:16,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398648225] [2022-01-30 21:23:16,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 21:23:16,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:23:16,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:23:16,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:23:16,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process