/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:53:40,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:53:40,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:53:40,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 03:53:40,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:53:40,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:53:40,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:53:40,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:53:40,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:53:40,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:53:40,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:53:40,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:53:40,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:53:40,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:53:40,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:53:40,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:53:40,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:53:40,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:53:40,453 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:53:40,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:53:40,454 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:53:40,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:53:40,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:53:40,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:53:40,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:53:40,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:53:40,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:53:40,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:53:40,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:53:40,455 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:53:40,456 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:53:40,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:53:40,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:53:40,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:53:40,660 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:53:40,661 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:53:40,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2022-03-20 03:53:40,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ad2889b/2a1c89ea0f314469a44c5e96ab490b42/FLAG6ff16bbbd [2022-03-20 03:53:41,077 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:53:41,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2022-03-20 03:53:41,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ad2889b/2a1c89ea0f314469a44c5e96ab490b42/FLAG6ff16bbbd [2022-03-20 03:53:41,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8ad2889b/2a1c89ea0f314469a44c5e96ab490b42 [2022-03-20 03:53:41,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:53:41,093 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:53:41,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:53:41,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:53:41,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:53:41,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec7fc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41, skipping insertion in model container [2022-03-20 03:53:41,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:53:41,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:53:41,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c[313,326] [2022-03-20 03:53:41,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:53:41,231 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:53:41,246 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c[313,326] [2022-03-20 03:53:41,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:53:41,256 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:53:41,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41 WrapperNode [2022-03-20 03:53:41,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:53:41,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:53:41,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:53:41,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:53:41,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:53:41,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:53:41,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:53:41,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:53:41,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:53:41,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:53:41,313 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) [2022-03-20 03:53:41,315 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 [2022-03-20 03:53:41,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:53:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:53:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:53:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:53:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:53:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:53:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:53:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:53:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:53:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:53:41,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:53:41,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:53:41,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:53:41,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:53:41,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:53:41,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:53:41,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:53:41,386 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:53:41,387 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:53:41,498 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:53:41,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:53:41,502 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 03:53:41,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:53:41 BoogieIcfgContainer [2022-03-20 03:53:41,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:53:41,517 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:53:41,517 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:53:41,518 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:53:41,520 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:53:41" (1/1) ... [2022-03-20 03:53:41,522 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:53:41,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:53:41 BasicIcfg [2022-03-20 03:53:41,534 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:53:41,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:53:41,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:53:41,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:53:41,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:53:41" (1/4) ... [2022-03-20 03:53:41,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9b1084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:53:41, skipping insertion in model container [2022-03-20 03:53:41,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:53:41" (2/4) ... [2022-03-20 03:53:41,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9b1084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:53:41, skipping insertion in model container [2022-03-20 03:53:41,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:53:41" (3/4) ... [2022-03-20 03:53:41,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9b1084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:53:41, skipping insertion in model container [2022-03-20 03:53:41,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:53:41" (4/4) ... [2022-03-20 03:53:41,540 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.cJordan [2022-03-20 03:53:41,543 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:53:41,543 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:53:41,580 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:53:41,584 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 03:53:41,584 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:53:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:53:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 03:53:41,597 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:53:41,598 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:53:41,598 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:53:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:53:41,602 INFO L85 PathProgramCache]: Analyzing trace with hash -756157467, now seen corresponding path program 1 times [2022-03-20 03:53:41,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:53:41,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327337582] [2022-03-20 03:53:41,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:41,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:53:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:41,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:53:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:41,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:53:41,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327337582] [2022-03-20 03:53:41,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327337582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:53:41,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:53:41,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:53:41,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046881731] [2022-03-20 03:53:41,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:53:41,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:53:41,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:53:41,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:53:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:53:41,734 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 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) [2022-03-20 03:53:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:53:41,773 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-03-20 03:53:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:53:41,775 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 [2022-03-20 03:53:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:53:41,795 INFO L225 Difference]: With dead ends: 19 [2022-03-20 03:53:41,796 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 03:53:41,797 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 [2022-03-20 03:53:41,799 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:53:41,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:53:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 03:53:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 03:53:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-20 03:53:41,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-20 03:53:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:53:41,837 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-20 03:53:41,837 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) [2022-03-20 03:53:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-20 03:53:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 03:53:41,838 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:53:41,838 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:53:41,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:53:41,838 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:53:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:53:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash -755233946, now seen corresponding path program 1 times [2022-03-20 03:53:41,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:53:41,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472112878] [2022-03-20 03:53:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:53:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:41,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:53:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:53:41,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472112878] [2022-03-20 03:53:41,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472112878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:53:41,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:53:41,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:53:41,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003904642] [2022-03-20 03:53:41,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:53:41,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:53:41,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:53:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:53:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:53:41,908 INFO L87 Difference]: Start difference. First operand 13 states and 14 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) [2022-03-20 03:53:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:53:41,940 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-03-20 03:53:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:53:41,940 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 [2022-03-20 03:53:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:53:41,941 INFO L225 Difference]: With dead ends: 15 [2022-03-20 03:53:41,941 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 03:53:41,941 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 [2022-03-20 03:53:41,942 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:53:41,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:53:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 03:53:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 03:53:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-20 03:53:41,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-20 03:53:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:53:41,946 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-20 03:53:41,946 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) [2022-03-20 03:53:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-20 03:53:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 03:53:41,947 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:53:41,947 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:53:41,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:53:41,947 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:53:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:53:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash 980092676, now seen corresponding path program 1 times [2022-03-20 03:53:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:53:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661209357] [2022-03-20 03:53:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:53:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:42,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:53:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:42,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:53:42,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661209357] [2022-03-20 03:53:42,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661209357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:53:42,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460531739] [2022-03-20 03:53:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:42,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:53:42,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:53:42,045 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) [2022-03-20 03:53:42,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:53:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:42,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 03:53:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:53:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:42,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:53:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:42,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460531739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:53:42,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:53:42,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 11 [2022-03-20 03:53:42,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519243073] [2022-03-20 03:53:42,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:53:42,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 03:53:42,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:53:42,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 03:53:42,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 03:53:42,281 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:53:42,384 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-03-20 03:53:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 03:53:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 03:53:42,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:53:42,385 INFO L225 Difference]: With dead ends: 18 [2022-03-20 03:53:42,386 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 03:53:42,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:53:42,394 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:53:42,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:53:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 03:53:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 03:53:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-20 03:53:42,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-03-20 03:53:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:53:42,397 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-20 03:53:42,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-20 03:53:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:53:42,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:53:42,397 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:53:42,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:53:42,614 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 [2022-03-20 03:53:42,614 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:53:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:53:42,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1575643231, now seen corresponding path program 1 times [2022-03-20 03:53:42,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:53:42,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157673340] [2022-03-20 03:53:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:42,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:53:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:42,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:53:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:42,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:53:42,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157673340] [2022-03-20 03:53:42,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157673340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:53:42,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193750269] [2022-03-20 03:53:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:42,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:53:42,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:53:42,721 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) [2022-03-20 03:53:42,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:53:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:42,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 03:53:42,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:53:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:42,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:53:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:42,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193750269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:53:42,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:53:42,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-03-20 03:53:42,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733625292] [2022-03-20 03:53:42,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:53:42,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 03:53:42,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:53:42,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 03:53:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-20 03:53:42,934 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:53:43,122 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-03-20 03:53:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:53:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 03:53:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:53:43,123 INFO L225 Difference]: With dead ends: 26 [2022-03-20 03:53:43,123 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 03:53:43,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-03-20 03:53:43,124 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:53:43,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:53:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 03:53:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 03:53:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-20 03:53:43,127 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 17 [2022-03-20 03:53:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:53:43,127 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-20 03:53:43,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-20 03:53:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 03:53:43,127 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:53:43,127 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:53:43,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:53:43,337 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 [2022-03-20 03:53:43,338 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:53:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:53:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash 109985751, now seen corresponding path program 2 times [2022-03-20 03:53:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:53:43,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626529482] [2022-03-20 03:53:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:43,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:53:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:43,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:53:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:43,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:53:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626529482] [2022-03-20 03:53:43,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626529482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:53:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664393648] [2022-03-20 03:53:43,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:53:43,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:53:43,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:53:43,467 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) [2022-03-20 03:53:43,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:53:43,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:53:43,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:53:43,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 03:53:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:53:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:43,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:53:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:53:43,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664393648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:53:43,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:53:43,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 23 [2022-03-20 03:53:43,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909176314] [2022-03-20 03:53:43,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:53:43,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 03:53:43,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:53:43,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 03:53:43,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-20 03:53:43,939 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:53:45,029 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-20 03:53:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 03:53:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 03:53:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:53:45,031 INFO L225 Difference]: With dead ends: 39 [2022-03-20 03:53:45,031 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 03:53:45,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 03:53:45,032 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:53:45,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 66 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:53:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 03:53:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 03:53:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-03-20 03:53:45,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 25 [2022-03-20 03:53:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:53:45,036 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-03-20 03:53:45,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-03-20 03:53:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 03:53:45,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:53:45,037 INFO L499 BasicCegarLoop]: trace histogram [12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:53:45,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 03:53:45,239 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 [2022-03-20 03:53:45,240 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:53:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:53:45,240 INFO L85 PathProgramCache]: Analyzing trace with hash 134643049, now seen corresponding path program 3 times [2022-03-20 03:53:45,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:53:45,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235364969] [2022-03-20 03:53:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:45,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:53:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:45,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:53:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 03:53:45,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:53:45,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235364969] [2022-03-20 03:53:45,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235364969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:53:45,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885632820] [2022-03-20 03:53:45,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:53:45,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:53:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:53:45,392 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) [2022-03-20 03:53:45,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 03:53:45,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-20 03:53:45,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:53:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 03:53:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:53:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-20 03:53:45,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:53:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-20 03:53:46,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885632820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:53:46,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:53:46,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 12] total 27 [2022-03-20 03:53:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385350508] [2022-03-20 03:53:46,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:53:46,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 03:53:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:53:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 03:53:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-03-20 03:53:46,161 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:53:49,588 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-03-20 03:53:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 03:53:49,588 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 03:53:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:53:49,589 INFO L225 Difference]: With dead ends: 57 [2022-03-20 03:53:49,589 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 03:53:49,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=563, Invalid=2089, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 03:53:49,591 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 03:53:49,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 66 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 03:53:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 03:53:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-20 03:53:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-20 03:53:49,594 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 35 [2022-03-20 03:53:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:53:49,595 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-20 03:53:49,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:53:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-20 03:53:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 03:53:49,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:53:49,596 INFO L499 BasicCegarLoop]: trace histogram [20, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:53:49,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 03:53:49,801 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 [2022-03-20 03:53:49,801 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:53:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:53:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1228107086, now seen corresponding path program 4 times [2022-03-20 03:53:49,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:53:49,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109258410] [2022-03-20 03:53:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:53:49,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:53:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:53:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:53:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 72 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 03:53:49,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:53:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109258410] [2022-03-20 03:53:49,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109258410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:53:49,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774748301] [2022-03-20 03:53:49,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:53:49,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:53:49,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:53:49,969 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) [2022-03-20 03:53:49,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 03:53:50,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:53:50,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:53:50,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 03:53:50,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:53:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 03:53:50,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:53:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 03:53:50,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774748301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:53:50,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:53:50,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 19] total 37 [2022-03-20 03:53:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917483885] [2022-03-20 03:53:50,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:53:50,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 03:53:50,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:53:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 03:53:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=962, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 03:53:50,903 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:54:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:54:16,559 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-03-20 03:54:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 03:54:16,559 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 03:54:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:54:16,560 INFO L225 Difference]: With dead ends: 86 [2022-03-20 03:54:16,560 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 03:54:16,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=1061, Invalid=2845, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 03:54:16,561 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:54:16,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 104 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 03:54:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 03:54:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-20 03:54:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:54:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-03-20 03:54:16,566 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 51 [2022-03-20 03:54:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:54:16,566 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-03-20 03:54:16,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:54:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-03-20 03:54:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 03:54:16,569 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:54:16,569 INFO L499 BasicCegarLoop]: trace histogram [37, 25, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:54:16,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 03:54:16,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:54:16,784 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:54:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:54:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash 525547056, now seen corresponding path program 5 times [2022-03-20 03:54:16,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:54:16,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654820821] [2022-03-20 03:54:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:54:16,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:54:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:17,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:54:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:54:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 598 proven. 650 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 03:54:17,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:54:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654820821] [2022-03-20 03:54:17,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654820821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:54:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994942737] [2022-03-20 03:54:17,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:54:17,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:54:17,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:54:17,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:54:17,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 03:54:25,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2022-03-20 03:54:25,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:54:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 03:54:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:54:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 352 proven. 992 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 03:54:26,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:54:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 352 proven. 992 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 03:54:28,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994942737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:54:28,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:54:28,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34, 35] total 69 [2022-03-20 03:54:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281626246] [2022-03-20 03:54:28,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:54:28,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 03:54:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:54:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 03:54:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1251, Invalid=3441, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 03:54:28,663 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:55:10,190 WARN L232 SmtUtils]: Spent 10.09s on a formula simplification. DAG size of input: 230 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:55:45,788 WARN L232 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 223 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:55:47,807 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse0 (mod (+ 23 c_main_~x~0) 4294967296))) (or (< .cse0 10000000) (not (< .cse0 100000000)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (let ((.cse1 (mod (+ 8 c_main_~x~0) 4294967296))) (or (< .cse1 10000000) (not (< .cse1 100000000)))) (let ((.cse2 (mod (+ 18 c_main_~x~0) 4294967296))) (or (not (< .cse2 100000000)) (< .cse2 10000000))) (let ((.cse3 (mod (+ 34 c_main_~x~0) 4294967296))) (or (not (< .cse3 100000000)) (< .cse3 10000000))) (let ((.cse4 (mod (+ 22 c_main_~x~0) 4294967296))) (or (not (< .cse4 100000000)) (< .cse4 10000000))) (let ((.cse5 (mod (+ 10 c_main_~x~0) 4294967296))) (or (< .cse5 10000000) (not (< .cse5 100000000)))) (let ((.cse6 (mod (+ 17 c_main_~x~0) 4294967296))) (or (< .cse6 10000000) (not (< .cse6 100000000)))) (let ((.cse7 (mod (+ 16 c_main_~x~0) 4294967296))) (or (< .cse7 10000000) (not (< .cse7 100000000)))) (let ((.cse8 (mod (+ 25 c_main_~x~0) 4294967296))) (or (< .cse8 10000000) (not (< .cse8 100000000)))) (let ((.cse9 (mod (+ 21 c_main_~x~0) 4294967296))) (or (not (< .cse9 100000000)) (< .cse9 10000000))) (let ((.cse10 (mod (+ 4 c_main_~x~0) 4294967296))) (or (< .cse10 10000000) (not (< .cse10 100000000)))) (let ((.cse11 (mod (+ 13 c_main_~x~0) 4294967296))) (or (< .cse11 10000000) (not (< .cse11 100000000)))) (let ((.cse12 (mod (+ 35 c_main_~x~0) 4294967296))) (or (not (< .cse12 100000000)) (< .cse12 10000000))) (let ((.cse13 (mod (+ 6 c_main_~x~0) 4294967296))) (or (< .cse13 10000000) (not (< .cse13 100000000)))) (let ((.cse14 (mod (+ 33 c_main_~x~0) 4294967296))) (or (not (< .cse14 100000000)) (< .cse14 10000000))) (let ((.cse15 (mod (+ 29 c_main_~x~0) 4294967296))) (or (not (< .cse15 100000000)) (< .cse15 10000000))) (let ((.cse16 (mod (+ 15 c_main_~x~0) 4294967296))) (or (not (< .cse16 100000000)) (< .cse16 10000000))) (let ((.cse17 (mod (+ 31 c_main_~x~0) 4294967296))) (or (not (< .cse17 100000000)) (< .cse17 10000000))) (let ((.cse18 (mod (+ 14 c_main_~x~0) 4294967296))) (or (not (< .cse18 100000000)) (< .cse18 10000000))) (let ((.cse19 (mod (+ 12 c_main_~x~0) 4294967296))) (or (< .cse19 10000000) (not (< .cse19 100000000)))) (let ((.cse20 (mod (+ 28 c_main_~x~0) 4294967296))) (or (< .cse20 10000000) (not (< .cse20 100000000)))) (let ((.cse21 (mod (+ 26 c_main_~x~0) 4294967296))) (or (not (< .cse21 100000000)) (< .cse21 10000000))) (let ((.cse22 (mod (+ 32 c_main_~x~0) 4294967296))) (or (not (< .cse22 100000000)) (< .cse22 10000000))) (let ((.cse23 (mod (+ 2 c_main_~x~0) 4294967296))) (or (< .cse23 10000000) (not (< .cse23 100000000)))) (let ((.cse24 (mod (+ 20 c_main_~x~0) 4294967296))) (or (not (< .cse24 100000000)) (< .cse24 10000000))) (let ((.cse25 (mod (+ 30 c_main_~x~0) 4294967296))) (or (< .cse25 10000000) (not (< .cse25 100000000)))) (let ((.cse26 (mod (+ c_main_~x~0 24) 4294967296))) (or (not (< .cse26 100000000)) (< .cse26 10000000))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< (mod c_main_~x~0 4294967296) 10000000) (let ((.cse27 (mod (+ c_main_~x~0 27) 4294967296))) (or (< .cse27 10000000) (not (< .cse27 100000000)))) (let ((.cse28 (mod (+ 19 c_main_~x~0) 4294967296))) (or (< .cse28 10000000) (not (< .cse28 100000000))))) is different from false [2022-03-20 03:56:32,947 WARN L232 SmtUtils]: Spent 12.22s on a formula simplification. DAG size of input: 210 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:57:12,459 WARN L232 SmtUtils]: Spent 12.68s on a formula simplification. DAG size of input: 209 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:57:45,181 WARN L232 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 202 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:58:23,033 WARN L232 SmtUtils]: Spent 11.64s on a formula simplification. DAG size of input: 195 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:58:50,797 WARN L232 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 188 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:59:25,224 WARN L232 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 181 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 04:01:00,645 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse0 (mod (+ 23 c_main_~x~0) 4294967296))) (or (< .cse0 10000000) (not (< .cse0 100000000)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (let ((.cse1 (mod (+ 8 c_main_~x~0) 4294967296))) (or (< .cse1 10000000) (not (< .cse1 100000000)))) (let ((.cse2 (mod (+ 18 c_main_~x~0) 4294967296))) (or (not (< .cse2 100000000)) (< .cse2 10000000))) (let ((.cse3 (mod (+ 22 c_main_~x~0) 4294967296))) (or (not (< .cse3 100000000)) (< .cse3 10000000))) (let ((.cse4 (mod (+ 10 c_main_~x~0) 4294967296))) (or (< .cse4 10000000) (not (< .cse4 100000000)))) (let ((.cse5 (mod (+ 17 c_main_~x~0) 4294967296))) (or (< .cse5 10000000) (not (< .cse5 100000000)))) (let ((.cse6 (mod (+ 16 c_main_~x~0) 4294967296))) (or (< .cse6 10000000) (not (< .cse6 100000000)))) (let ((.cse7 (mod (+ 25 c_main_~x~0) 4294967296))) (or (< .cse7 10000000) (not (< .cse7 100000000)))) (let ((.cse8 (mod (+ 21 c_main_~x~0) 4294967296))) (or (not (< .cse8 100000000)) (< .cse8 10000000))) (let ((.cse9 (mod (+ 4 c_main_~x~0) 4294967296))) (or (< .cse9 10000000) (not (< .cse9 100000000)))) (let ((.cse10 (mod (+ 13 c_main_~x~0) 4294967296))) (or (< .cse10 10000000) (not (< .cse10 100000000)))) (let ((.cse11 (mod (+ 6 c_main_~x~0) 4294967296))) (or (< .cse11 10000000) (not (< .cse11 100000000)))) (let ((.cse12 (mod (+ 15 c_main_~x~0) 4294967296))) (or (not (< .cse12 100000000)) (< .cse12 10000000))) (let ((.cse13 (mod (+ 14 c_main_~x~0) 4294967296))) (or (not (< .cse13 100000000)) (< .cse13 10000000))) (let ((.cse14 (mod (+ 12 c_main_~x~0) 4294967296))) (or (< .cse14 10000000) (not (< .cse14 100000000)))) (let ((.cse15 (mod (+ 26 c_main_~x~0) 4294967296))) (or (not (< .cse15 100000000)) (< .cse15 10000000))) (let ((.cse16 (mod (+ 2 c_main_~x~0) 4294967296))) (or (< .cse16 10000000) (not (< .cse16 100000000)))) (let ((.cse17 (mod (+ 20 c_main_~x~0) 4294967296))) (or (not (< .cse17 100000000)) (< .cse17 10000000))) (let ((.cse18 (mod (+ c_main_~x~0 24) 4294967296))) (or (not (< .cse18 100000000)) (< .cse18 10000000))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< (mod c_main_~x~0 4294967296) 10000000) (let ((.cse19 (mod (+ 19 c_main_~x~0) 4294967296))) (or (< .cse19 10000000) (not (< .cse19 100000000))))) is different from false [2022-03-20 04:05:12,161 WARN L232 SmtUtils]: Spent 39.87s on a formula simplification. DAG size of input: 233 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 04:05:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:05:12,230 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2022-03-20 04:05:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 04:05:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-20 04:05:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:05:12,231 INFO L225 Difference]: With dead ends: 152 [2022-03-20 04:05:12,231 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 04:05:12,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 644.9s TimeCoverageRelationStatistics Valid=4294, Invalid=11947, Unknown=23, NotChecked=506, Total=16770 [2022-03-20 04:05:12,235 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:05:12,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 184 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1964 Invalid, 0 Unknown, 2 Unchecked, 1.1s Time] [2022-03-20 04:05:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 04:05:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-20 04:05:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.054421768707483) internal successors, (155), 147 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:05:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 159 transitions. [2022-03-20 04:05:12,250 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 159 transitions. Word has length 85 [2022-03-20 04:05:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:05:12,250 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 159 transitions. [2022-03-20 04:05:12,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:05:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 159 transitions. [2022-03-20 04:05:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 04:05:12,252 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:05:12,252 INFO L499 BasicCegarLoop]: trace histogram [70, 58, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:05:12,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 04:05:12,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:05:12,462 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:05:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:05:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1736138738, now seen corresponding path program 6 times [2022-03-20 04:05:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:05:12,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976467604] [2022-03-20 04:05:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:05:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:05:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:05:14,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:05:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:05:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1357 proven. 3422 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 04:05:14,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:05:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976467604] [2022-03-20 04:05:14,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976467604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:05:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548463699] [2022-03-20 04:05:14,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:05:14,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:05:14,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:05:14,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:05:14,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 04:05:35,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2022-03-20 04:05:35,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:05:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 04:05:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:05:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2022 proven. 984 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2022-03-20 04:05:38,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:05:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1450 proven. 144 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2022-03-20 04:05:40,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548463699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:05:40,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:05:40,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 28, 19] total 105 [2022-03-20 04:05:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964039991] [2022-03-20 04:05:40,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:05:40,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 04:05:40,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:05:40,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 04:05:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2717, Invalid=8203, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 04:05:40,627 INFO L87 Difference]: Start difference. First operand 152 states and 159 transitions. Second operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)