/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/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:14:42,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:14:42,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:14:42,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:14:42,305 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 [2022-03-19 22:14:42,318 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:14:42,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:14:42,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:14:42,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:14:42,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:14:42,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:14:42,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:14:42,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:14:42,320 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:14:42,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:14:42,320 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:14:42,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:14:42,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:14:42,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:14:42,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:14:42,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:14:42,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:14:42,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:14:42,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:14:42,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:14:42,471 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:14:42,471 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:14:42,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-03-19 22:14:42,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a130dea/9d6ff81c86f3448b8a965dc5a83a735c/FLAGb49ae1c22 [2022-03-19 22:14:42,931 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:14:42,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-03-19 22:14:42,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a130dea/9d6ff81c86f3448b8a965dc5a83a735c/FLAGb49ae1c22 [2022-03-19 22:14:42,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a130dea/9d6ff81c86f3448b8a965dc5a83a735c [2022-03-19 22:14:42,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:14:42,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:14:42,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:14:42,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:14:42,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:14:42,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:14:42" (1/1) ... [2022-03-19 22:14:42,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba397ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:42, skipping insertion in model container [2022-03-19 22:14:42,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:14:42" (1/1) ... [2022-03-19 22:14:42,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:14:42,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:14:43,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-03-19 22:14:43,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:14:43,117 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:14:43,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-03-19 22:14:43,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:14:43,134 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:14:43,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43 WrapperNode [2022-03-19 22:14:43,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:14:43,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:14:43,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:14:43,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:14:43,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (1/1) ... [2022-03-19 22:14:43,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (1/1) ... [2022-03-19 22:14:43,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (1/1) ... [2022-03-19 22:14:43,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (1/1) ... [2022-03-19 22:14:43,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (1/1) ... [2022-03-19 22:14:43,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (1/1) ... [2022-03-19 22:14:43,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (1/1) ... [2022-03-19 22:14:43,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:14:43,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:14:43,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:14:43,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:14:43,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (1/1) ... [2022-03-19 22:14:43,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:14:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:43,178 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) [2022-03-19 22:14:43,203 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 [2022-03-19 22:14:43,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:14:43,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:14:43,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:14:43,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:14:43,223 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-03-19 22:14:43,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:14:43,223 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:14:43,223 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:14:43,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:14:43,262 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:14:43,263 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:14:43,330 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:14:43,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:14:43,333 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 22:14:43,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:14:43 BoogieIcfgContainer [2022-03-19 22:14:43,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:14:43,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:14:43,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:14:43,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:14:43,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:14:42" (1/3) ... [2022-03-19 22:14:43,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8dacb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:14:43, skipping insertion in model container [2022-03-19 22:14:43,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:43" (2/3) ... [2022-03-19 22:14:43,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8dacb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:14:43, skipping insertion in model container [2022-03-19 22:14:43,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:14:43" (3/3) ... [2022-03-19 22:14:43,353 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2022-03-19 22:14:43,356 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:14:43,356 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:14:43,382 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:14:43,386 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 [2022-03-19 22:14:43,386 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:14:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:14:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 22:14:43,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:43,398 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:43,399 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:43,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 1 times [2022-03-19 22:14:43,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:43,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966877414] [2022-03-19 22:14:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:43,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:43,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:14:43,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:43,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966877414] [2022-03-19 22:14:43,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966877414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:14:43,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:14:43,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 22:14:43,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231449100] [2022-03-19 22:14:43,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:14:43,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 22:14:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:43,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 22:14:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 22:14:43,566 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:43,595 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-19 22:14:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 22:14:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 22:14:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:43,602 INFO L225 Difference]: With dead ends: 34 [2022-03-19 22:14:43,602 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 22:14:43,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 22:14:43,610 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:43,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:14:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 22:14:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 22:14:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:14:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-19 22:14:43,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2022-03-19 22:14:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:43,633 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-19 22:14:43,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-19 22:14:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 22:14:43,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:43,634 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:43,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:14:43,634 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 1 times [2022-03-19 22:14:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:43,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684085214] [2022-03-19 22:14:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:43,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:43,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:14:43,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684085214] [2022-03-19 22:14:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684085214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:14:43,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:14:43,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:14:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238470307] [2022-03-19 22:14:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:14:43,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:14:43,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:14:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:14:43,706 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:43,741 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-03-19 22:14:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:14:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 22:14:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:43,742 INFO L225 Difference]: With dead ends: 25 [2022-03-19 22:14:43,743 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 22:14:43,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:14:43,744 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:43,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:14:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 22:14:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-03-19 22:14:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:14:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-19 22:14:43,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-03-19 22:14:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:43,751 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-19 22:14:43,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-19 22:14:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 22:14:43,752 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:43,752 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:43,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 22:14:43,752 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 1 times [2022-03-19 22:14:43,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:43,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042705548] [2022-03-19 22:14:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:43,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:43,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:43,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:14:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:14:43,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:43,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042705548] [2022-03-19 22:14:43,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042705548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:43,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095807313] [2022-03-19 22:14:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:43,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:43,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:43,859 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) [2022-03-19 22:14:43,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:14:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 22:14:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:14:43,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:14:44,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095807313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:44,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:44,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-19 22:14:44,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929712029] [2022-03-19 22:14:44,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:44,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 22:14:44,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 22:14:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-19 22:14:44,103 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:14:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:44,222 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-19 22:14:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 22:14:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 17 [2022-03-19 22:14:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:44,224 INFO L225 Difference]: With dead ends: 29 [2022-03-19 22:14:44,224 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 22:14:44,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-03-19 22:14:44,225 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:44,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 52 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:14:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 22:14:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-19 22:14:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:14:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-19 22:14:44,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-03-19 22:14:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:44,231 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-19 22:14:44,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:14:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-19 22:14:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 22:14:44,232 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:44,232 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:44,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 22:14:44,450 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 [2022-03-19 22:14:44,451 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash -371085120, now seen corresponding path program 2 times [2022-03-19 22:14:44,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:44,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538574127] [2022-03-19 22:14:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:44,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:44,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:14:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:44,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 22:14:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:44,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 22:14:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:14:44,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538574127] [2022-03-19 22:14:44,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538574127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286650743] [2022-03-19 22:14:44,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:14:44,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:44,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:44,646 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) [2022-03-19 22:14:44,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:14:44,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:14:44,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:14:44,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 22:14:44,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:14:44,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:14:45,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286650743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:45,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:45,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 22 [2022-03-19 22:14:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896189635] [2022-03-19 22:14:45,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:45,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 22:14:45,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:45,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 22:14:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-19 22:14:45,128 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 22:14:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:45,602 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-19 22:14:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 22:14:45,602 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 29 [2022-03-19 22:14:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:45,603 INFO L225 Difference]: With dead ends: 41 [2022-03-19 22:14:45,603 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 22:14:45,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 22:14:45,604 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:45,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 94 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:14:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 22:14:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-19 22:14:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 22:14:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-03-19 22:14:45,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 29 [2022-03-19 22:14:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:45,611 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-03-19 22:14:45,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 22:14:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-03-19 22:14:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 22:14:45,612 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:45,612 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:45,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 22:14:45,823 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 [2022-03-19 22:14:45,823 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1581790520, now seen corresponding path program 3 times [2022-03-19 22:14:45,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:45,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591115563] [2022-03-19 22:14:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:45,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:14:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 22:14:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 22:14:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 22:14:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:14:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:14:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:14:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-19 22:14:46,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:46,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591115563] [2022-03-19 22:14:46,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591115563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:46,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468904949] [2022-03-19 22:14:46,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:14:46,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:46,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:46,207 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) [2022-03-19 22:14:46,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:14:46,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-19 22:14:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:14:46,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 22:14:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-19 22:14:46,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:14:47,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468904949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:47,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:47,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 42 [2022-03-19 22:14:47,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337534806] [2022-03-19 22:14:47,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:47,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 22:14:47,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 22:14:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 22:14:47,344 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 22:14:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:52,246 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2022-03-19 22:14:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 22:14:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 53 [2022-03-19 22:14:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:52,248 INFO L225 Difference]: With dead ends: 65 [2022-03-19 22:14:52,248 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 22:14:52,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=845, Invalid=4267, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 22:14:52,250 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:52,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 143 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 22:14:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 22:14:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-19 22:14:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 18 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 22:14:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-03-19 22:14:52,259 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 53 [2022-03-19 22:14:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:52,259 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-03-19 22:14:52,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 27 states have internal predecessors, (56), 16 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 22:14:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-03-19 22:14:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 22:14:52,261 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:52,262 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:52,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:14:52,462 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 [2022-03-19 22:14:52,462 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:52,463 INFO L85 PathProgramCache]: Analyzing trace with hash -346716632, now seen corresponding path program 4 times [2022-03-19 22:14:52,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:52,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745016869] [2022-03-19 22:14:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:14:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 22:14:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 22:14:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 22:14:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:14:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:14:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:14:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:14:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:14:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 22:14:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-19 22:14:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:14:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:14:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 22:14:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 22:14:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-19 22:14:53,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:53,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745016869] [2022-03-19 22:14:53,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745016869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:53,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547411649] [2022-03-19 22:14:53,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:14:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:53,241 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) [2022-03-19 22:14:53,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:14:53,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:14:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:14:53,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-19 22:14:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-19 22:14:53,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-19 22:14:56,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547411649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:56,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:56,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 48] total 82 [2022-03-19 22:14:56,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932476631] [2022-03-19 22:14:56,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:56,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 22:14:56,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:56,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 22:14:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=5953, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 22:14:56,150 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 22:17:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:17:13,855 INFO L93 Difference]: Finished difference Result 113 states and 158 transitions. [2022-03-19 22:17:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 22:17:13,855 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 101 [2022-03-19 22:17:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:17:13,857 INFO L225 Difference]: With dead ends: 113 [2022-03-19 22:17:13,857 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 22:17:13,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 172 SyntacticMatches, 15 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 137.8s TimeCoverageRelationStatistics Valid=3098, Invalid=17491, Unknown=3, NotChecked=0, Total=20592 [2022-03-19 22:17:13,861 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 87 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 3828 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 4216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:17:13,861 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 261 Invalid, 4216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 3828 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 22:17:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 22:17:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-03-19 22:17:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 34 states have call successors, (34), 4 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 22:17:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2022-03-19 22:17:13,875 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 101 [2022-03-19 22:17:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:17:13,876 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2022-03-19 22:17:13,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 51 states have internal predecessors, (104), 32 states have call successors, (34), 3 states have call predecessors, (34), 17 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 22:17:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2022-03-19 22:17:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-19 22:17:13,881 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:17:13,881 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:17:13,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:17:14,082 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 [2022-03-19 22:17:14,082 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:17:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:17:14,083 INFO L85 PathProgramCache]: Analyzing trace with hash 143738888, now seen corresponding path program 5 times [2022-03-19 22:17:14,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:17:14,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790174548] [2022-03-19 22:17:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:17:14,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:17:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:17:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:17:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 22:17:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 22:17:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 22:17:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:17:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:17:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:17:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:17:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:17:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 22:17:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-19 22:17:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:17:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:17:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 22:17:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 22:17:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-19 22:17:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:15,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 22:17:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-19 22:17:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-19 22:17:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-19 22:17:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-19 22:17:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-19 22:17:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-19 22:17:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-19 22:17:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-19 22:17:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-19 22:17:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-03-19 22:17:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-03-19 22:17:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-19 22:17:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-03-19 22:17:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-03-19 22:17:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:17:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-03-19 22:17:16,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:17:16,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790174548] [2022-03-19 22:17:16,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790174548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:17:16,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950976881] [2022-03-19 22:17:16,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:17:16,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:17:16,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:17:16,109 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) [2022-03-19 22:17:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:17:32,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-19 22:17:32,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:17:32,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 313 conjunts are in the unsatisfiable core [2022-03-19 22:17:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:17:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-03-19 22:17:34,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:17:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-03-19 22:17:42,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950976881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:17:42,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:17:42,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 96] total 162 [2022-03-19 22:17:42,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583775353] [2022-03-19 22:17:42,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:17:42,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-03-19 22:17:42,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:17:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-03-19 22:17:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2401, Invalid=23681, Unknown=0, NotChecked=0, Total=26082 [2022-03-19 22:17:42,369 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 162 states, 162 states have (on average 1.2345679012345678) internal successors, (200), 99 states have internal predecessors, (200), 64 states have call successors, (66), 3 states have call predecessors, (66), 33 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-19 22:17:51,402 WARN L833 $PredicateComparison]: unable to prove that (and (< (mod (+ 16 |c_main_#t~ret4|) 4294967296) 268435455) (= |c_#NULL.base| |c_old(#NULL.base)|) (< (mod (+ 52 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 50) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 10) 4294967296) 268435455) (< (mod (+ 42 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 12) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 38) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 28) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 20) 4294967296) 268435455) (< (mod (+ 2 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 60) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 24) 4294967296) 268435455) (< (mod (+ 34 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 26) 4294967296) 268435455) (< (mod (+ 46 |c_main_#t~ret4|) 4294967296) 268435455) (<= 62 c_main_~x~0) (< (mod (+ |c_main_#t~ret4| 18) 4294967296) 268435455) (< (mod (+ 56 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 14 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 36) 4294967296) 268435455) (< (mod (+ 32 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 4) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 48) 4294967296) 268435455) (< (mod (+ 30 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ 40 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 58) 4294967296) 268435455) (< (mod (+ 6 |c_main_#t~ret4|) 4294967296) 268435455) (< (mod (+ |c_main_#t~ret4| 54) 4294967296) 268435455) (< (mod |c_main_#t~ret4| 4294967296) 268435455) (< (mod (+ 44 |c_main_#t~ret4|) 4294967296) 268435455) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< (mod (+ 22 |c_main_#t~ret4|) 4294967296) 268435455) (<= c_main_~x~0 62) (< (mod (+ |c_main_#t~ret4| 8) 4294967296) 268435455)) is different from false [2022-03-19 22:20:43,393 WARN L232 SmtUtils]: Spent 9.73s on a formula simplification. DAG size of input: 132 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:23:30,357 WARN L232 SmtUtils]: Spent 24.49s on a formula simplification. DAG size of input: 222 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:27:40,795 WARN L232 SmtUtils]: Spent 32.01s on a formula simplification. DAG size of input: 215 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)