/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:59:42,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:59:42,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:59:42,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 05:59:42,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:59:42,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:59:42,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:59:42,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:59:42,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:59:42,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:59:42,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:59:42,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:59:42,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:59:42,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:59:42,578 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:59:42,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:59:42,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:59:42,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:59:42,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:59:42,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:59:42,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:59:42,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:59:42,580 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:59:42,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:59:42,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:59:42,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:59:42,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:59:42,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:59:42,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:59:42,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:59:42,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:59:42,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:59:42,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:59:42,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:59:42,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:59:42,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:59:42,583 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:59:42,584 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:59:42,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:59:42,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:59:42,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:59:42,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:59:42,825 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:59:42,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-04-05 05:59:42,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/541477f1c/5c0f1f20b741470ca2e2de38a2d036e0/FLAG4a4bac9a3 [2022-04-05 05:59:43,243 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:59:43,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-04-05 05:59:43,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/541477f1c/5c0f1f20b741470ca2e2de38a2d036e0/FLAG4a4bac9a3 [2022-04-05 05:59:43,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/541477f1c/5c0f1f20b741470ca2e2de38a2d036e0 [2022-04-05 05:59:43,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:59:43,270 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:59:43,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:59:43,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:59:43,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:59:43,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6603ffd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43, skipping insertion in model container [2022-04-05 05:59:43,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:59:43,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:59:43,406 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/mono-crafted_13.c[319,332] [2022-04-05 05:59:43,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:59:43,454 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:59:43,463 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/mono-crafted_13.c[319,332] [2022-04-05 05:59:43,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:59:43,478 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:59:43,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43 WrapperNode [2022-04-05 05:59:43,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:59:43,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:59:43,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:59:43,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:59:43,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:59:43,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:59:43,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:59:43,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:59:43,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:59:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:43,552 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) [2022-04-05 05:59:43,578 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 [2022-04-05 05:59:43,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:59:43,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:59:43,593 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:59:43,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:59:43,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:59:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:59:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:59:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:59:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:59:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:59:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:59:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:59:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:59:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:59:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:59:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:59:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:59:43,651 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:59:43,652 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:59:43,726 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:59:43,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:59:43,730 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 05:59:43,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:59:43 BoogieIcfgContainer [2022-04-05 05:59:43,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:59:43,733 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:59:43,733 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:59:43,734 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:59:43,736 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:59:43" (1/1) ... [2022-04-05 05:59:43,738 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:59:43,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:59:43 BasicIcfg [2022-04-05 05:59:43,750 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:59:43,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:59:43,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:59:43,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:59:43,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:59:43" (1/4) ... [2022-04-05 05:59:43,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4014c04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:59:43, skipping insertion in model container [2022-04-05 05:59:43,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:43" (2/4) ... [2022-04-05 05:59:43,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4014c04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:59:43, skipping insertion in model container [2022-04-05 05:59:43,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:59:43" (3/4) ... [2022-04-05 05:59:43,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4014c04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:59:43, skipping insertion in model container [2022-04-05 05:59:43,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:59:43" (4/4) ... [2022-04-05 05:59:43,757 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.cqvasr [2022-04-05 05:59:43,760 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:59:43,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:59:43,796 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:59:43,802 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 05:59:43,802 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:59:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-04-05 05:59:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:59:43,820 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:43,820 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:43,821 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-04-05 05:59:43,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:43,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062426479] [2022-04-05 05:59:43,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:43,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:43,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:59:43,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062426479] [2022-04-05 05:59:43,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062426479] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:59:43,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:59:43,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:59:43,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945931148] [2022-04-05 05:59:43,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:59:44,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:59:44,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:44,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:59:44,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:59:44,024 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-05 05:59:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:44,054 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-04-05 05:59:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:59:44,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-04-05 05:59:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:44,061 INFO L225 Difference]: With dead ends: 34 [2022-04-05 05:59:44,061 INFO L226 Difference]: Without dead ends: 14 [2022-04-05 05:59:44,064 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 [2022-04-05 05:59:44,066 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 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 [2022-04-05 05:59:44,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-05 05:59:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-05 05:59:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2022-04-05 05:59:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-04-05 05:59:44,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-04-05 05:59:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:44,094 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-04-05 05:59:44,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-05 05:59:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-04-05 05:59:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:59:44,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:44,095 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:44,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:59:44,096 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-04-05 05:59:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:44,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825097214] [2022-04-05 05:59:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:44,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:44,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:59:44,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:44,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825097214] [2022-04-05 05:59:44,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825097214] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:59:44,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:59:44,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:59:44,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788253685] [2022-04-05 05:59:44,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:59:44,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:59:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:59:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:59:44,222 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-05 05:59:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:44,289 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-04-05 05:59:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:59:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-04-05 05:59:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:44,291 INFO L225 Difference]: With dead ends: 24 [2022-04-05 05:59:44,291 INFO L226 Difference]: Without dead ends: 16 [2022-04-05 05:59:44,291 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 [2022-04-05 05:59:44,293 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:44,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:59:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-05 05:59:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-05 05:59:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-04-05 05:59:44,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-04-05 05:59:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:44,298 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-04-05 05:59:44,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-05 05:59:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-04-05 05:59:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 05:59:44,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:44,299 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:44,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:59:44,300 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-04-05 05:59:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:44,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236575747] [2022-04-05 05:59:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:44,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:44,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:44,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236575747] [2022-04-05 05:59:44,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236575747] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:59:44,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:59:44,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:59:44,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610739935] [2022-04-05 05:59:44,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:59:44,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:59:44,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:44,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:59:44,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:59:44,360 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:44,404 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-04-05 05:59:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:59:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-05 05:59:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:44,406 INFO L225 Difference]: With dead ends: 22 [2022-04-05 05:59:44,406 INFO L226 Difference]: Without dead ends: 17 [2022-04-05 05:59:44,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:59:44,408 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:44,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-05 05:59:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-05 05:59:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2022-04-05 05:59:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-05 05:59:44,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-04-05 05:59:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:44,413 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-05 05:59:44,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-05 05:59:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 05:59:44,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:44,414 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:44,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 05:59:44,415 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-04-05 05:59:44,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27651888] [2022-04-05 05:59:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:44,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27651888] [2022-04-05 05:59:44,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27651888] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962988201] [2022-04-05 05:59:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:44,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:44,511 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) [2022-04-05 05:59:44,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:59:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 05:59:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:44,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:44,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962988201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:44,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:44,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 05:59:44,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230203120] [2022-04-05 05:59:44,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:44,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 05:59:44,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 05:59:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 05:59:44,669 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-04-05 05:59:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:44,756 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-04-05 05:59:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:59:44,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 15 [2022-04-05 05:59:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:44,759 INFO L225 Difference]: With dead ends: 30 [2022-04-05 05:59:44,760 INFO L226 Difference]: Without dead ends: 21 [2022-04-05 05:59:44,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:59:44,770 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:44,771 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-05 05:59:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-05 05:59:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2022-04-05 05:59:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-04-05 05:59:44,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2022-04-05 05:59:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:44,776 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-04-05 05:59:44,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-04-05 05:59:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-05 05:59:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-05 05:59:44,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:44,777 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:44,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:45,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:45,003 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash 987258878, now seen corresponding path program 1 times [2022-04-05 05:59:45,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:45,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121289699] [2022-04-05 05:59:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:45,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:45,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121289699] [2022-04-05 05:59:45,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121289699] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416887094] [2022-04-05 05:59:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:45,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:45,092 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) [2022-04-05 05:59:45,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:59:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:45,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 05:59:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:45,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:45,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416887094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:45,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:45,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-05 05:59:45,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370721630] [2022-04-05 05:59:45,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:45,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 05:59:45,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 05:59:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-05 05:59:45,276 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-04-05 05:59:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:45,384 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-04-05 05:59:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 05:59:45,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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 19 [2022-04-05 05:59:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:45,386 INFO L225 Difference]: With dead ends: 38 [2022-04-05 05:59:45,386 INFO L226 Difference]: Without dead ends: 28 [2022-04-05 05:59:45,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:59:45,389 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:45,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-05 05:59:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-05 05:59:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-04-05 05:59:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-04-05 05:59:45,403 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-04-05 05:59:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:45,403 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-04-05 05:59:45,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-04-05 05:59:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-05 05:59:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 05:59:45,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:45,405 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:45,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:45,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:45,628 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:45,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1768540306, now seen corresponding path program 2 times [2022-04-05 05:59:45,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:45,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680917625] [2022-04-05 05:59:45,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:45,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:45,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:45,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:45,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680917625] [2022-04-05 05:59:45,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680917625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:45,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094269715] [2022-04-05 05:59:45,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:59:45,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:45,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:45,718 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) [2022-04-05 05:59:45,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:59:45,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:59:45,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 05:59:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:45,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:45,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094269715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:45,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:45,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-05 05:59:45,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406107012] [2022-04-05 05:59:45,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:45,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 05:59:45,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 05:59:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-05 05:59:45,985 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-04-05 05:59:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:46,206 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-04-05 05:59:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 05:59:46,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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 27 [2022-04-05 05:59:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:46,209 INFO L225 Difference]: With dead ends: 54 [2022-04-05 05:59:46,209 INFO L226 Difference]: Without dead ends: 44 [2022-04-05 05:59:46,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-04-05 05:59:46,210 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:46,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:59:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-05 05:59:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-05 05:59:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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) [2022-04-05 05:59:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-04-05 05:59:46,217 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-04-05 05:59:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:46,217 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-04-05 05:59:46,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-04-05 05:59:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-04-05 05:59:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 05:59:46,218 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:46,218 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:46,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:46,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:46,419 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1912510030, now seen corresponding path program 3 times [2022-04-05 05:59:46,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:46,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497648067] [2022-04-05 05:59:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:46,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:46,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497648067] [2022-04-05 05:59:46,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497648067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605229824] [2022-04-05 05:59:46,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:59:46,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:46,644 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) [2022-04-05 05:59:46,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:59:46,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-05 05:59:46,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 05:59:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-05 05:59:46,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-05 05:59:46,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605229824] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:46,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:46,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-04-05 05:59:46,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534538552] [2022-04-05 05:59:46,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:46,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 05:59:46,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 05:59:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-04-05 05:59:46,999 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 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) [2022-04-05 05:59:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:47,430 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-04-05 05:59:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 05:59:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 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 43 [2022-04-05 05:59:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:47,432 INFO L225 Difference]: With dead ends: 62 [2022-04-05 05:59:47,432 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 05:59:47,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 05:59:47,433 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:47,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 35 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:59:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 05:59:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-04-05 05:59:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 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) [2022-04-05 05:59:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-04-05 05:59:47,440 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2022-04-05 05:59:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:47,441 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-04-05 05:59:47,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 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) [2022-04-05 05:59:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-04-05 05:59:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 05:59:47,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:47,442 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:47,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:47,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:47,655 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash -534849494, now seen corresponding path program 4 times [2022-04-05 05:59:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:47,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613048441] [2022-04-05 05:59:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:47,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:47,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:59:47,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:47,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613048441] [2022-04-05 05:59:47,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613048441] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:47,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988920271] [2022-04-05 05:59:47,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:59:47,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:47,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:47,824 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) [2022-04-05 05:59:47,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:59:47,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:59:47,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 05:59:47,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:59:47,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:59:48,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988920271] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:48,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:48,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-05 05:59:48,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177787716] [2022-04-05 05:59:48,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:48,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-05 05:59:48,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:48,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-05 05:59:48,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-05 05:59:48,424 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 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) [2022-04-05 05:59:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:49,070 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-04-05 05:59:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 05:59:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 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 49 [2022-04-05 05:59:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:49,071 INFO L225 Difference]: With dead ends: 98 [2022-04-05 05:59:49,072 INFO L226 Difference]: Without dead ends: 84 [2022-04-05 05:59:49,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 05:59:49,074 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:49,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 46 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:59:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-05 05:59:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-05 05:59:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 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) [2022-04-05 05:59:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-04-05 05:59:49,093 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 49 [2022-04-05 05:59:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:49,093 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-04-05 05:59:49,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 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) [2022-04-05 05:59:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-04-05 05:59:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-05 05:59:49,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:49,098 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:49,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:49,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:49,328 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash 83508550, now seen corresponding path program 5 times [2022-04-05 05:59:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094884339] [2022-04-05 05:59:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:49,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:49,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:59:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094884339] [2022-04-05 05:59:49,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094884339] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892106774] [2022-04-05 05:59:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:59:49,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:49,851 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) [2022-04-05 05:59:49,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 05:59:49,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2022-04-05 05:59:49,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 05:59:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:59:50,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:59:51,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892106774] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:51,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:51,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-05 05:59:51,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503985766] [2022-04-05 05:59:51,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:51,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-05 05:59:51,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-05 05:59:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-05 05:59:51,410 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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) [2022-04-05 05:59:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:53,285 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2022-04-05 05:59:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-05 05:59:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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 83 [2022-04-05 05:59:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:53,287 INFO L225 Difference]: With dead ends: 166 [2022-04-05 05:59:53,287 INFO L226 Difference]: Without dead ends: 152 [2022-04-05 05:59:53,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-04-05 05:59:53,292 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:53,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 36 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:59:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-05 05:59:53,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-04-05 05:59:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 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) [2022-04-05 05:59:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2022-04-05 05:59:53,320 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 83 [2022-04-05 05:59:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:53,321 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2022-04-05 05:59:53,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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) [2022-04-05 05:59:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2022-04-05 05:59:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-05 05:59:53,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:53,322 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:53,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:53,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:53,546 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:53,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1884680830, now seen corresponding path program 6 times [2022-04-05 05:59:53,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:53,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703331741] [2022-04-05 05:59:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:53,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:55,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:59:55,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:55,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703331741] [2022-04-05 05:59:55,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703331741] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:55,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965663112] [2022-04-05 05:59:55,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:59:55,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:55,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:55,147 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) [2022-04-05 05:59:55,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 05:59:55,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 05:59:55,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 05:59:55,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 4305 trivial. 0 not checked. [2022-04-05 05:59:55,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 4305 trivial. 0 not checked. [2022-04-05 05:59:55,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965663112] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:55,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:55,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 4, 4] total 74 [2022-04-05 05:59:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739924148] [2022-04-05 05:59:55,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:55,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-05 05:59:55,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:55,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-05 05:59:55,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 05:59:55,696 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 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) [2022-04-05 05:59:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:57,777 INFO L93 Difference]: Finished difference Result 174 states and 185 transitions. [2022-04-05 05:59:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-05 05:59:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 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 151 [2022-04-05 05:59:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:57,780 INFO L225 Difference]: With dead ends: 174 [2022-04-05 05:59:57,780 INFO L226 Difference]: Without dead ends: 160 [2022-04-05 05:59:57,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2551 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-04-05 05:59:57,786 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 219 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:57,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 45 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:59:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-05 05:59:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-04-05 05:59:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.038709677419355) internal successors, (161), 155 states have internal predecessors, (161), 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) [2022-04-05 05:59:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2022-04-05 05:59:57,799 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 151 [2022-04-05 05:59:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:57,799 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2022-04-05 05:59:57,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 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) [2022-04-05 05:59:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2022-04-05 05:59:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-05 05:59:57,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:57,801 INFO L499 BasicCegarLoop]: trace histogram [71, 67, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:57,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:58,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:58,017 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash 68492171, now seen corresponding path program 7 times [2022-04-05 05:59:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:58,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580666772] [2022-04-05 05:59:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:58,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:59,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5056 backedges. 476 proven. 4556 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 05:59:59,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580666772] [2022-04-05 05:59:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580666772] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099381167] [2022-04-05 05:59:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:59:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:59,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:59,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 05:59:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:59,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 05:59:59,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5056 backedges. 476 proven. 4556 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 05:59:59,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:00:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5056 backedges. 476 proven. 4556 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 06:00:04,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099381167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:00:04,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:00:04,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-05 06:00:04,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281120223] [2022-04-05 06:00:04,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:00:04,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-04-05 06:00:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:00:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-04-05 06:00:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-04-05 06:00:04,350 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 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) [2022-04-05 06:00:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:00:10,494 INFO L93 Difference]: Finished difference Result 318 states and 397 transitions. [2022-04-05 06:00:10,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-04-05 06:00:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 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 159 [2022-04-05 06:00:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:00:10,497 INFO L225 Difference]: With dead ends: 318 [2022-04-05 06:00:10,497 INFO L226 Difference]: Without dead ends: 298 [2022-04-05 06:00:10,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-04-05 06:00:10,504 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:00:10,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 36 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:00:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-04-05 06:00:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2022-04-05 06:00:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.0204778156996588) internal successors, (299), 293 states have internal predecessors, (299), 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) [2022-04-05 06:00:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 303 transitions. [2022-04-05 06:00:10,522 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 303 transitions. Word has length 159 [2022-04-05 06:00:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:00:10,523 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 303 transitions. [2022-04-05 06:00:10,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 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) [2022-04-05 06:00:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 303 transitions. [2022-04-05 06:00:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-04-05 06:00:10,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:00:10,525 INFO L499 BasicCegarLoop]: trace histogram [140, 136, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:00:10,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 06:00:10,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 06:00:10,736 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:00:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:00:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1833554857, now seen corresponding path program 8 times [2022-04-05 06:00:10,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:00:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028682431] [2022-04-05 06:00:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:00:10,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:00:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:16,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:00:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19615 backedges. 959 proven. 18632 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 06:00:16,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:00:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028682431] [2022-04-05 06:00:16,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028682431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:00:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539912148] [2022-04-05 06:00:16,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:00:16,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:00:16,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:00:16,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:00:16,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 06:00:16,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:00:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:00:16,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 138 conjunts are in the unsatisfiable core [2022-04-05 06:00:16,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:00:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19615 backedges. 959 proven. 18632 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 06:00:17,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:00:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19615 backedges. 959 proven. 18632 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 06:00:34,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539912148] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:00:34,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:00:34,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-04-05 06:00:34,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467606509] [2022-04-05 06:00:34,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:00:34,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-04-05 06:00:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:00:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-04-05 06:00:34,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-04-05 06:00:34,165 INFO L87 Difference]: Start difference. First operand 298 states and 303 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 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) [2022-04-05 06:00:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:00:57,998 INFO L93 Difference]: Finished difference Result 594 states and 742 transitions. [2022-04-05 06:00:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-04-05 06:00:57,998 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 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 297 [2022-04-05 06:00:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:00:58,001 INFO L225 Difference]: With dead ends: 594 [2022-04-05 06:00:58,001 INFO L226 Difference]: Without dead ends: 574 [2022-04-05 06:00:58,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-04-05 06:00:58,018 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:00:58,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 56 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:00:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-04-05 06:00:58,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2022-04-05 06:00:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 569 states have (on average 1.0105448154657293) internal successors, (575), 569 states have internal predecessors, (575), 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) [2022-04-05 06:00:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 579 transitions. [2022-04-05 06:00:58,048 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 579 transitions. Word has length 297 [2022-04-05 06:00:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:00:58,049 INFO L478 AbstractCegarLoop]: Abstraction has 574 states and 579 transitions. [2022-04-05 06:00:58,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 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) [2022-04-05 06:00:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 579 transitions. [2022-04-05 06:00:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2022-04-05 06:00:58,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:00:58,058 INFO L499 BasicCegarLoop]: trace histogram [278, 274, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:00:58,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-05 06:00:58,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:00:58,274 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:00:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:00:58,274 INFO L85 PathProgramCache]: Analyzing trace with hash -670818065, now seen corresponding path program 9 times [2022-04-05 06:00:58,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:00:58,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905514738] [2022-04-05 06:00:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:00:58,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:00:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:01:20,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:01:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:01:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 77299 backedges. 1925 proven. 75350 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 06:01:21,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:01:21,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905514738] [2022-04-05 06:01:21,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905514738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:01:21,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259515033] [2022-04-05 06:01:21,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:01:21,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:01:21,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:01:21,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:01:21,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 06:01:21,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-04-05 06:01:21,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:01:21,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 06:01:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:01:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 77299 backedges. 1934 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-04-05 06:01:23,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:01:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 77299 backedges. 1934 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-04-05 06:01:25,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259515033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:01:25,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:01:25,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 10, 10] total 294 [2022-04-05 06:01:25,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010973426] [2022-04-05 06:01:25,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:01:25,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 294 states [2022-04-05 06:01:25,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:01:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 294 interpolants. [2022-04-05 06:01:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38380, Invalid=47762, Unknown=0, NotChecked=0, Total=86142 [2022-04-05 06:01:25,649 INFO L87 Difference]: Start difference. First operand 574 states and 579 transitions. Second operand has 294 states, 294 states have (on average 2.0272108843537415) internal successors, (596), 293 states have internal predecessors, (596), 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) [2022-04-05 06:01:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:01:58,558 INFO L93 Difference]: Finished difference Result 625 states and 655 transitions. [2022-04-05 06:01:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-04-05 06:01:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 294 states, 294 states have (on average 2.0272108843537415) internal successors, (596), 293 states have internal predecessors, (596), 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 573 [2022-04-05 06:01:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:01:58,561 INFO L225 Difference]: With dead ends: 625 [2022-04-05 06:01:58,561 INFO L226 Difference]: Without dead ends: 605 [2022-04-05 06:01:58,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1714 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48475 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=119790, Invalid=220682, Unknown=0, NotChecked=0, Total=340472 [2022-04-05 06:01:58,575 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 851 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 1421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1421 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:01:58,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 81 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1421 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 06:01:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-04-05 06:01:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 585. [2022-04-05 06:01:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 580 states have (on average 1.0103448275862068) internal successors, (586), 580 states have internal predecessors, (586), 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) [2022-04-05 06:01:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 590 transitions. [2022-04-05 06:01:58,605 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 590 transitions. Word has length 573 [2022-04-05 06:01:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:01:58,606 INFO L478 AbstractCegarLoop]: Abstraction has 585 states and 590 transitions. [2022-04-05 06:01:58,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 294 states, 294 states have (on average 2.0272108843537415) internal successors, (596), 293 states have internal predecessors, (596), 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) [2022-04-05 06:01:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 590 transitions. [2022-04-05 06:01:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2022-04-05 06:01:58,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:01:58,617 INFO L499 BasicCegarLoop]: trace histogram [279, 275, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:01:58,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 06:01:58,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 06:01:58,835 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:01:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:01:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2013652097, now seen corresponding path program 10 times [2022-04-05 06:01:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:01:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193860892] [2022-04-05 06:01:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:01:58,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:01:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:02:21,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:02:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:02:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 77946 backedges. 1932 proven. 75900 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-05 06:02:21,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:02:21,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193860892] [2022-04-05 06:02:21,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193860892] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:02:21,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407167098] [2022-04-05 06:02:21,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:02:21,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:02:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:02:21,803 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:02:21,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 06:02:21,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:02:21,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:02:21,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 277 conjunts are in the unsatisfiable core [2022-04-05 06:02:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:02:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 77946 backedges. 1932 proven. 75900 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-05 06:02:22,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:03:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 77946 backedges. 1932 proven. 75900 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-05 06:03:31,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407167098] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:03:31,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:03:31,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-04-05 06:03:31,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028117140] [2022-04-05 06:03:31,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:03:31,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-04-05 06:03:31,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:03:31,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-04-05 06:03:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-04-05 06:03:31,598 INFO L87 Difference]: Start difference. First operand 585 states and 590 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 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) [2022-04-05 06:05:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:05:13,545 INFO L93 Difference]: Finished difference Result 1168 states and 1455 transitions. [2022-04-05 06:05:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-04-05 06:05:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 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 584 [2022-04-05 06:05:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:05:13,552 INFO L225 Difference]: With dead ends: 1168 [2022-04-05 06:05:13,552 INFO L226 Difference]: Without dead ends: 1139 [2022-04-05 06:05:13,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1999 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 182.6s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-04-05 06:05:13,639 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:05:13,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 41 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:05:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-04-05 06:05:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2022-04-05 06:05:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1134 states have (on average 1.0052910052910053) internal successors, (1140), 1134 states have internal predecessors, (1140), 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) [2022-04-05 06:05:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1144 transitions. [2022-04-05 06:05:13,712 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1144 transitions. Word has length 584 [2022-04-05 06:05:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:05:13,713 INFO L478 AbstractCegarLoop]: Abstraction has 1139 states and 1144 transitions. [2022-04-05 06:05:13,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 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) [2022-04-05 06:05:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1144 transitions. [2022-04-05 06:05:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1139 [2022-04-05 06:05:13,725 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:05:13,725 INFO L499 BasicCegarLoop]: trace histogram [556, 552, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:05:13,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 06:05:13,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 06:05:13,939 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:05:13,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:05:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash 273589619, now seen corresponding path program 11 times [2022-04-05 06:05:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:05:13,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878551731] [2022-04-05 06:05:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:05:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:05:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:48,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 309241 backedges. 3871 proven. 305256 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-05 06:06:48,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:48,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878551731] [2022-04-05 06:06:48,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878551731] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:48,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307674166] [2022-04-05 06:06:48,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:06:48,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:48,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:48,088 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 06:06:49,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 557 check-sat command(s) [2022-04-05 06:06:49,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:06:49,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 2358 conjuncts, 554 conjunts are in the unsatisfiable core [2022-04-05 06:06:50,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 309241 backedges. 3871 proven. 305256 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-05 06:06:51,957 INFO L328 TraceCheckSpWp]: Computing backward predicates...