/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/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 11:52:52,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 11:52:52,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 11:52:53,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 11:52:53,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 11:52:53,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 11:52:53,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 11:52:53,077 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 [2022-03-18 11:52:53,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 11:52:53,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 11:52:53,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 11:52:53,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 11:52:53,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 11:52:53,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 11:52:53,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 11:52:53,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 11:52:53,099 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 11:52:53,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 11:52:53,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 11:52:53,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 11:52:53,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 11:52:53,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 11:52:53,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 11:52:53,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:52:53,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 11:52:53,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 11:52:53,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 11:52:53,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 11:52:53,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 11:52:53,102 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 11:52:53,102 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 11:52:53,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 11:52:53,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 11:52:53,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 11:52:53,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 11:52:53,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 11:52:53,327 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 11:52:53,327 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 11:52:53,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2022-03-18 11:52:53,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89adbb3f9/b13e7834ca384b73b7f52d8a80a1e34c/FLAGf0649be0b [2022-03-18 11:52:53,751 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 11:52:53,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2022-03-18 11:52:53,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89adbb3f9/b13e7834ca384b73b7f52d8a80a1e34c/FLAGf0649be0b [2022-03-18 11:52:53,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89adbb3f9/b13e7834ca384b73b7f52d8a80a1e34c [2022-03-18 11:52:53,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 11:52:53,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 11:52:53,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 11:52:53,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 11:52:53,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 11:52:53,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:52:53" (1/1) ... [2022-03-18 11:52:53,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50cd24d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:53, skipping insertion in model container [2022-03-18 11:52:53,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:52:53" (1/1) ... [2022-03-18 11:52:53,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 11:52:53,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 11:52:53,963 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/array_2-2.i[849,862] [2022-03-18 11:52:53,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:52:53,983 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 11:52:53,995 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/array_2-2.i[849,862] [2022-03-18 11:52:54,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:52:54,016 INFO L208 MainTranslator]: Completed translation [2022-03-18 11:52:54,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54 WrapperNode [2022-03-18 11:52:54,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 11:52:54,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 11:52:54,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 11:52:54,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 11:52:54,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (1/1) ... [2022-03-18 11:52:54,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (1/1) ... [2022-03-18 11:52:54,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (1/1) ... [2022-03-18 11:52:54,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (1/1) ... [2022-03-18 11:52:54,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (1/1) ... [2022-03-18 11:52:54,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (1/1) ... [2022-03-18 11:52:54,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (1/1) ... [2022-03-18 11:52:54,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 11:52:54,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 11:52:54,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 11:52:54,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 11:52:54,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (1/1) ... [2022-03-18 11:52:54,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:52:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:52:54,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 11:52:54,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 11:52:54,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 11:52:54,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 11:52:54,139 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 11:52:54,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 11:52:54,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 11:52:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 11:52:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 11:52:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 11:52:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 11:52:54,221 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 11:52:54,222 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 11:52:54,362 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 11:52:54,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 11:52:54,368 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 11:52:54,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:52:54 BoogieIcfgContainer [2022-03-18 11:52:54,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 11:52:54,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 11:52:54,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 11:52:54,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 11:52:54,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:52:53" (1/3) ... [2022-03-18 11:52:54,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b804a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:52:54, skipping insertion in model container [2022-03-18 11:52:54,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:52:54" (2/3) ... [2022-03-18 11:52:54,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b804a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:52:54, skipping insertion in model container [2022-03-18 11:52:54,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:52:54" (3/3) ... [2022-03-18 11:52:54,384 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2022-03-18 11:52:54,389 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 11:52:54,390 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 11:52:54,427 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 11:52:54,431 INFO L340 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 [2022-03-18 11:52:54,431 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 11:52:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 11:52:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 11:52:54,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:52:54,446 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:52:54,446 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:52:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:52:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1954431608, now seen corresponding path program 1 times [2022-03-18 11:52:54,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:52:54,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331131620] [2022-03-18 11:52:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:52:54,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:52:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:54,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:52:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:52:54,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:52:54,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331131620] [2022-03-18 11:52:54,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331131620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:52:54,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:52:54,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 11:52:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376556880] [2022-03-18 11:52:54,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:52:54,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 11:52:54,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:52:54,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 11:52:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:52:54,696 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:52:54,729 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-03-18 11:52:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 11:52:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 11:52:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:52:54,738 INFO L225 Difference]: With dead ends: 40 [2022-03-18 11:52:54,739 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 11:52:54,741 INFO L911 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 [2022-03-18 11:52:54,746 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:52:54,748 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:52:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 11:52:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 11:52:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-18 11:52:54,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-03-18 11:52:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:52:54,775 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-18 11:52:54,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-18 11:52:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 11:52:54,776 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:52:54,776 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:52:54,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 11:52:54,777 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:52:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:52:54,781 INFO L85 PathProgramCache]: Analyzing trace with hash 301833364, now seen corresponding path program 1 times [2022-03-18 11:52:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:52:54,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313898928] [2022-03-18 11:52:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:52:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:52:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:54,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:52:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:52:54,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:52:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313898928] [2022-03-18 11:52:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313898928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:52:54,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:52:54,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:52:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912852083] [2022-03-18 11:52:54,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:52:54,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:52:54,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:52:54,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:52:54,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:52:54,874 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:52:54,923 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-18 11:52:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 11:52:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 11:52:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:52:54,925 INFO L225 Difference]: With dead ends: 30 [2022-03-18 11:52:54,925 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 11:52:54,928 INFO L911 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 [2022-03-18 11:52:54,929 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:52:54,930 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:52:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 11:52:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-03-18 11:52:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-03-18 11:52:54,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-03-18 11:52:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:52:54,943 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-03-18 11:52:54,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-03-18 11:52:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 11:52:54,949 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:52:54,949 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:52:54,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 11:52:54,949 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:52:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:52:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1319589272, now seen corresponding path program 1 times [2022-03-18 11:52:54,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:52:54,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572351979] [2022-03-18 11:52:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:52:54,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:52:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:55,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:52:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:52:55,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:52:55,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572351979] [2022-03-18 11:52:55,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572351979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:52:55,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064804840] [2022-03-18 11:52:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:52:55,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:52:55,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:52:55,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:52:55,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 11:52:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:55,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 11:52:55,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:52:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:52:55,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:52:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:52:55,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064804840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:52:55,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:52:55,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 11:52:55,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668722891] [2022-03-18 11:52:55,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:52:55,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 11:52:55,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:52:55,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 11:52:55,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 11:52:55,235 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:52:55,389 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-03-18 11:52:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 11:52:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 18 [2022-03-18 11:52:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:52:55,390 INFO L225 Difference]: With dead ends: 41 [2022-03-18 11:52:55,390 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 11:52:55,390 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 11:52:55,391 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:52:55,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:52:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 11:52:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 11:52:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-18 11:52:55,395 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 18 [2022-03-18 11:52:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:52:55,395 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-18 11:52:55,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-18 11:52:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 11:52:55,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:52:55,396 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:52:55,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 11:52:55,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:52:55,611 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:52:55,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:52:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash -515500892, now seen corresponding path program 2 times [2022-03-18 11:52:55,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:52:55,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947688897] [2022-03-18 11:52:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:52:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:52:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:55,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:52:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 11:52:55,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:52:55,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947688897] [2022-03-18 11:52:55,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947688897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:52:55,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153334999] [2022-03-18 11:52:55,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 11:52:55,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:52:55,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:52:55,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:52:55,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 11:52:55,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 11:52:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:52:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 11:52:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:52:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 11:52:55,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:52:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 11:52:55,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153334999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:52:55,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:52:55,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 11:52:55,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288327760] [2022-03-18 11:52:55,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:52:55,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 11:52:55,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:52:55,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 11:52:55,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-18 11:52:55,987 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:52:56,184 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2022-03-18 11:52:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 11:52:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 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 30 [2022-03-18 11:52:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:52:56,187 INFO L225 Difference]: With dead ends: 71 [2022-03-18 11:52:56,188 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 11:52:56,190 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-03-18 11:52:56,193 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:52:56,194 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 26 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:52:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 11:52:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 11:52:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-18 11:52:56,210 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 30 [2022-03-18 11:52:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:52:56,211 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-18 11:52:56,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-18 11:52:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 11:52:56,213 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:52:56,214 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:52:56,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 11:52:56,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 11:52:56,428 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:52:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:52:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash -58938180, now seen corresponding path program 3 times [2022-03-18 11:52:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:52:56,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487772043] [2022-03-18 11:52:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:52:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:52:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:56,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:52:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:52:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 11:52:56,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:52:56,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487772043] [2022-03-18 11:52:56,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487772043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:52:56,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733052886] [2022-03-18 11:52:56,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 11:52:56,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:52:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:52:56,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:52:56,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 11:52:58,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-18 11:52:58,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:52:58,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 11:52:58,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:52:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 11:52:58,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:52:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 11:52:58,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733052886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:52:58,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:52:58,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 11:52:58,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162155161] [2022-03-18 11:52:58,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:52:58,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 11:52:58,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:52:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 11:52:58,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 11:52:58,952 INFO L87 Difference]: Start difference. First operand 55 states and 56 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) [2022-03-18 11:52:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:52:59,404 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2022-03-18 11:52:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 11:52:59,405 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 54 [2022-03-18 11:52:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:52:59,405 INFO L225 Difference]: With dead ends: 131 [2022-03-18 11:52:59,406 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 11:52:59,407 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 11:52:59,407 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 147 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 11:52:59,407 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 26 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 11:52:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 11:52:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 11:52:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:52:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-18 11:52:59,414 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 54 [2022-03-18 11:52:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:52:59,415 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-18 11:52:59,415 INFO L479 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) [2022-03-18 11:52:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-18 11:52:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-18 11:52:59,416 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:52:59,416 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:52:59,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 11:52:59,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:52:59,639 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:52:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:52:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1599227116, now seen corresponding path program 4 times [2022-03-18 11:52:59,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:52:59,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455805455] [2022-03-18 11:52:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:52:59,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:52:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:00,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 11:53:00,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455805455] [2022-03-18 11:53:00,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455805455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:53:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955438211] [2022-03-18 11:53:00,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 11:53:00,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:00,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:53:00,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:53:00,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 11:53:00,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 11:53:00,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:53:00,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 11:53:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:53:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 11:53:00,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:53:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 11:53:01,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955438211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:53:01,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:53:01,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-18 11:53:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188321638] [2022-03-18 11:53:01,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:53:01,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 11:53:01,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:53:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 11:53:01,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 11:53:01,035 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:53:02,266 INFO L93 Difference]: Finished difference Result 251 states and 300 transitions. [2022-03-18 11:53:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 11:53:02,267 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 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 102 [2022-03-18 11:53:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:53:02,271 INFO L225 Difference]: With dead ends: 251 [2022-03-18 11:53:02,272 INFO L226 Difference]: Without dead ends: 199 [2022-03-18 11:53:02,274 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 11:53:02,276 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 315 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 11:53:02,277 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 41 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 11:53:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-18 11:53:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-03-18 11:53:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-03-18 11:53:02,298 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 102 [2022-03-18 11:53:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:53:02,299 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-03-18 11:53:02,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-03-18 11:53:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-18 11:53:02,301 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:53:02,301 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:53:02,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 11:53:02,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:02,517 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:53:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:53:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -826337972, now seen corresponding path program 5 times [2022-03-18 11:53:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:53:02,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371182735] [2022-03-18 11:53:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:02,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:53:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-18 11:53:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371182735] [2022-03-18 11:53:03,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371182735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:53:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191286588] [2022-03-18 11:53:03,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 11:53:03,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:03,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:53:03,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:53:03,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process