/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:41:18,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:41:18,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:41:18,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 03:41:18,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:41:18,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:41:18,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:41:18,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:41:18,770 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:41:18,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:41:18,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:41:18,772 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:41:18,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:41:18,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:41:18,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:41:18,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:41:18,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:41:18,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:41:18,774 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:41:18,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:41:18,774 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:41:18,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:41:18,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:41:18,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:41:18,774 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:41:18,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:41:18,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:41:18,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:41:18,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:41:18,775 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:41:18,775 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:41:18,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:41:18,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:41:18,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:41:18,980 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:41:18,981 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:41:18,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2022-03-20 03:41:19,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581dd5871/5d5df61e1a7e42b993454533cf7a90e5/FLAG0a5d58b2b [2022-03-20 03:41:19,398 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:41:19,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i [2022-03-20 03:41:19,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581dd5871/5d5df61e1a7e42b993454533cf7a90e5/FLAG0a5d58b2b [2022-03-20 03:41:19,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581dd5871/5d5df61e1a7e42b993454533cf7a90e5 [2022-03-20 03:41:19,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:41:19,413 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:41:19,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:41:19,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:41:19,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:41:19,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57740f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19, skipping insertion in model container [2022-03-20 03:41:19,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:41:19,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:41:19,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2022-03-20 03:41:19,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:41:19,566 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:41:19,574 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2022-03-20 03:41:19,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:41:19,582 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:41:19,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19 WrapperNode [2022-03-20 03:41:19,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:41:19,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:41:19,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:41:19,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:41:19,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:41:19,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:41:19,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:41:19,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:41:19,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:41:19,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:19,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 03:41:19,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 03:41:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:41:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:41:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:41:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 03:41:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:41:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:41:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:41:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:41:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 03:41:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 03:41:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:41:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:41:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 03:41:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:41:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:41:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:41:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:41:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:41:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:41:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:41:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:41:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:41:19,733 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:41:19,734 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:41:19,793 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:41:19,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:41:19,796 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 03:41:19,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:41:19 BoogieIcfgContainer [2022-03-20 03:41:19,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:41:19,798 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:41:19,798 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:41:19,798 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:41:19,800 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:41:19" (1/1) ... [2022-03-20 03:41:19,801 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:41:19,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:41:19 BasicIcfg [2022-03-20 03:41:19,809 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:41:19,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:41:19,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:41:19,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:41:19,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:41:19" (1/4) ... [2022-03-20 03:41:19,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e9def2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:41:19, skipping insertion in model container [2022-03-20 03:41:19,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:41:19" (2/4) ... [2022-03-20 03:41:19,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e9def2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:41:19, skipping insertion in model container [2022-03-20 03:41:19,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:41:19" (3/4) ... [2022-03-20 03:41:19,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e9def2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:41:19, skipping insertion in model container [2022-03-20 03:41:19,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:41:19" (4/4) ... [2022-03-20 03:41:19,813 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.iJordan [2022-03-20 03:41:19,816 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:41:19,816 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:41:19,840 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:41:19,844 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 03:41:19,844 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:41:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:41:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 03:41:19,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:19,855 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:19,856 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:19,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1859546765, now seen corresponding path program 1 times [2022-03-20 03:41:19,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196767421] [2022-03-20 03:41:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:19,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:19,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:19,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196767421] [2022-03-20 03:41:19,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196767421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:41:19,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:41:19,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:41:19,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171302797] [2022-03-20 03:41:19,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:41:19,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:41:19,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:19,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:41:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:41:20,002 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:20,046 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-03-20 03:41:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:41:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 03:41:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:20,056 INFO L225 Difference]: With dead ends: 20 [2022-03-20 03:41:20,056 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 03:41:20,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:41:20,059 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:20,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:41:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 03:41:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 03:41:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-03-20 03:41:20,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-03-20 03:41:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:20,084 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-03-20 03:41:20,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-03-20 03:41:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 03:41:20,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:20,086 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:20,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:41:20,086 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:20,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1860470286, now seen corresponding path program 1 times [2022-03-20 03:41:20,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:20,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070789443] [2022-03-20 03:41:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:20,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:20,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070789443] [2022-03-20 03:41:20,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070789443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:41:20,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:41:20,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:41:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112764657] [2022-03-20 03:41:20,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:41:20,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:41:20,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:41:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:41:20,174 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:20,202 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-03-20 03:41:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:41:20,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 03:41:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:20,203 INFO L225 Difference]: With dead ends: 15 [2022-03-20 03:41:20,203 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 03:41:20,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:41:20,207 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:20,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:41:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 03:41:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-20 03:41:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-20 03:41:20,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-20 03:41:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:20,215 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-20 03:41:20,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-20 03:41:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 03:41:20,216 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:20,216 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:20,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:41:20,216 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:20,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:20,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2116914316, now seen corresponding path program 1 times [2022-03-20 03:41:20,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:20,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66204691] [2022-03-20 03:41:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:20,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:20,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:20,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:20,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66204691] [2022-03-20 03:41:20,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66204691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80072662] [2022-03-20 03:41:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:20,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:20,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:41:20,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:41:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:20,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 03:41:20,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:20,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:20,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80072662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:20,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:20,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 03:41:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058724508] [2022-03-20 03:41:20,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:20,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:41:20,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:41:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:41:20,488 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:20,536 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-03-20 03:41:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:41:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 13 [2022-03-20 03:41:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:20,537 INFO L225 Difference]: With dead ends: 20 [2022-03-20 03:41:20,537 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 03:41:20,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:41:20,538 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:20,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:41:20,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 03:41:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 03:41:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-20 03:41:20,540 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2022-03-20 03:41:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:20,540 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-20 03:41:20,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-20 03:41:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 03:41:20,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:20,541 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:20,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:41:20,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:20,756 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:20,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1596837114, now seen corresponding path program 2 times [2022-03-20 03:41:20,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:20,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973727403] [2022-03-20 03:41:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:20,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:20,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:20,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973727403] [2022-03-20 03:41:20,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973727403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115356094] [2022-03-20 03:41:20,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:41:20,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:20,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:20,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:41:20,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:41:20,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:41:20,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 03:41:20,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:20,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:20,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115356094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:20,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:20,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 03:41:20,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717756564] [2022-03-20 03:41:20,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:20,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 03:41:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:20,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 03:41:20,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:41:20,994 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:21,097 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-20 03:41:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 03:41:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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 [2022-03-20 03:41:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:21,098 INFO L225 Difference]: With dead ends: 32 [2022-03-20 03:41:21,098 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 03:41:21,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-03-20 03:41:21,100 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:21,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:41:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 03:41:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 03:41:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-03-20 03:41:21,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2022-03-20 03:41:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:21,103 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-03-20 03:41:21,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-03-20 03:41:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 03:41:21,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:21,104 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:21,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 03:41:21,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 03:41:21,338 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:21,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1511565958, now seen corresponding path program 3 times [2022-03-20 03:41:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:21,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031469859] [2022-03-20 03:41:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:21,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:21,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:21,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031469859] [2022-03-20 03:41:21,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031469859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540285031] [2022-03-20 03:41:21,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:41:21,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:21,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:21,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:41:21,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:41:21,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 03:41:21,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:21,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 03:41:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:21,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:21,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540285031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:21,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:21,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 03:41:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642273052] [2022-03-20 03:41:21,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:21,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 03:41:21,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 03:41:21,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 03:41:21,738 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:22,040 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-20 03:41:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 03:41:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 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 31 [2022-03-20 03:41:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:22,041 INFO L225 Difference]: With dead ends: 56 [2022-03-20 03:41:22,042 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 03:41:22,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 03:41:22,043 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:22,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 23 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:41:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 03:41:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 03:41:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-03-20 03:41:22,047 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 31 [2022-03-20 03:41:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:22,047 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-03-20 03:41:22,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-03-20 03:41:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 03:41:22,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:22,049 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:22,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 03:41:22,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:22,253 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash -739610526, now seen corresponding path program 4 times [2022-03-20 03:41:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:22,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847256758] [2022-03-20 03:41:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:22,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:22,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:22,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:22,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847256758] [2022-03-20 03:41:22,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847256758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:22,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653669173] [2022-03-20 03:41:22,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:41:22,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:22,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:22,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:41:22,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 03:41:22,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:41:22,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 03:41:22,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:22,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:23,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653669173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:23,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:23,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 03:41:23,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804588155] [2022-03-20 03:41:23,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:23,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 03:41:23,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:23,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 03:41:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 03:41:23,259 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:24,117 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-20 03:41:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 03:41:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 55 [2022-03-20 03:41:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:24,119 INFO L225 Difference]: With dead ends: 104 [2022-03-20 03:41:24,119 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 03:41:24,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 03:41:24,122 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:24,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 23 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:41:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 03:41:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 03:41:24,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-03-20 03:41:24,127 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 55 [2022-03-20 03:41:24,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:24,127 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-03-20 03:41:24,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-03-20 03:41:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 03:41:24,129 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:24,129 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:24,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 03:41:24,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:24,345 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 652213810, now seen corresponding path program 5 times [2022-03-20 03:41:24,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:24,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555213395] [2022-03-20 03:41:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:24,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:25,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:25,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555213395] [2022-03-20 03:41:25,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555213395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:25,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538111061] [2022-03-20 03:41:25,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:41:25,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:25,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:25,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:41:25,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 03:41:25,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-03-20 03:41:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 03:41:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:25,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:27,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538111061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:27,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:27,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 03:41:27,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976576606] [2022-03-20 03:41:27,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:27,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 03:41:27,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:27,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 03:41:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 03:41:27,458 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:30,439 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-03-20 03:41:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 03:41:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 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 103 [2022-03-20 03:41:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:30,440 INFO L225 Difference]: With dead ends: 200 [2022-03-20 03:41:30,440 INFO L226 Difference]: Without dead ends: 200 [2022-03-20 03:41:30,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-03-20 03:41:30,447 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 194 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:30,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 33 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:41:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-20 03:41:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-20 03:41:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2022-03-20 03:41:30,460 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 103 [2022-03-20 03:41:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:30,460 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2022-03-20 03:41:30,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2022-03-20 03:41:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 03:41:30,462 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:30,462 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:30,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 03:41:30,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:30,678 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:30,679 INFO L85 PathProgramCache]: Analyzing trace with hash 149453266, now seen corresponding path program 6 times [2022-03-20 03:41:30,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:30,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156653496] [2022-03-20 03:41:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:30,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:32,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:32,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:32,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156653496] [2022-03-20 03:41:32,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156653496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:32,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137924953] [2022-03-20 03:41:32,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 03:41:32,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:32,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:32,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:41:32,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 03:41:33,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-03-20 03:41:33,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:41:33,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 03:41:33,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:33,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:41:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:39,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137924953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:41:39,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:41:39,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-20 03:41:39,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770654562] [2022-03-20 03:41:39,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:41:39,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-03-20 03:41:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:41:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-03-20 03:41:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 03:41:39,030 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:41:48,263 INFO L93 Difference]: Finished difference Result 392 states and 392 transitions. [2022-03-20 03:41:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-20 03:41:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 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 199 [2022-03-20 03:41:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:41:48,266 INFO L225 Difference]: With dead ends: 392 [2022-03-20 03:41:48,266 INFO L226 Difference]: Without dead ends: 392 [2022-03-20 03:41:48,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22984 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=55201, Invalid=91871, Unknown=0, NotChecked=0, Total=147072 [2022-03-20 03:41:48,274 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 386 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:41:48,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 53 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 03:41:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-03-20 03:41:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-03-20 03:41:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 387 states have (on average 1.0025839793281655) internal successors, (388), 387 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 392 transitions. [2022-03-20 03:41:48,285 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 392 transitions. Word has length 199 [2022-03-20 03:41:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:41:48,286 INFO L478 AbstractCegarLoop]: Abstraction has 392 states and 392 transitions. [2022-03-20 03:41:48,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:41:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 392 transitions. [2022-03-20 03:41:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-03-20 03:41:48,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:41:48,289 INFO L499 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:41:48,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 03:41:48,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:48,504 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:41:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:41:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash 7270674, now seen corresponding path program 7 times [2022-03-20 03:41:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:41:48,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977514400] [2022-03-20 03:41:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:41:48,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:41:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:56,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:41:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:56,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:41:56,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977514400] [2022-03-20 03:41:56,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977514400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:41:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562139432] [2022-03-20 03:41:56,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 03:41:56,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:41:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:41:56,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:41:56,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 03:41:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:41:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 192 conjunts are in the unsatisfiable core [2022-03-20 03:41:56,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:41:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:41:56,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:42:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:42:19,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562139432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:42:19,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:42:19,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 193, 193] total 386 [2022-03-20 03:42:19,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000609162] [2022-03-20 03:42:19,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:42:19,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-03-20 03:42:19,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:42:19,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-03-20 03:42:19,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2022-03-20 03:42:19,514 INFO L87 Difference]: Start difference. First operand 392 states and 392 transitions. Second operand has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:42:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:42:54,193 INFO L93 Difference]: Finished difference Result 776 states and 776 transitions. [2022-03-20 03:42:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2022-03-20 03:42:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 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 391 [2022-03-20 03:42:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:42:54,197 INFO L225 Difference]: With dead ends: 776 [2022-03-20 03:42:54,197 INFO L226 Difference]: Without dead ends: 776 [2022-03-20 03:42:54,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1358 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 766 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92056 ImplicationChecksByTransitivity, 61.0s TimeCoverageRelationStatistics Valid=220993, Invalid=368063, Unknown=0, NotChecked=0, Total=589056 [2022-03-20 03:42:54,229 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 961 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 03:42:54,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 48 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 03:42:54,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-20 03:42:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-03-20 03:42:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 771 states have (on average 1.0012970168612192) internal successors, (772), 771 states have internal predecessors, (772), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:42:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 776 transitions. [2022-03-20 03:42:54,247 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 776 transitions. Word has length 391 [2022-03-20 03:42:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:42:54,248 INFO L478 AbstractCegarLoop]: Abstraction has 776 states and 776 transitions. [2022-03-20 03:42:54,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:42:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 776 transitions. [2022-03-20 03:42:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2022-03-20 03:42:54,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:42:54,262 INFO L499 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:42:54,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 03:42:54,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:42:54,476 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:42:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:42:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash -716054638, now seen corresponding path program 8 times [2022-03-20 03:42:54,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:42:54,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805331822] [2022-03-20 03:42:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:42:54,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:42:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:23,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:43:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:43:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:43:23,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:43:23,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805331822] [2022-03-20 03:43:23,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805331822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:43:23,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333450720] [2022-03-20 03:43:23,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:43:23,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:43:23,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:43:23,953 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) [2022-03-20 03:43:23,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 03:43:24,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:43:24,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:43:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 384 conjunts are in the unsatisfiable core [2022-03-20 03:43:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:43:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:43:24,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:44:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:44:55,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333450720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:44:55,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:44:55,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [386, 385, 385] total 770 [2022-03-20 03:44:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152453582] [2022-03-20 03:44:55,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:44:55,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 770 states [2022-03-20 03:44:55,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:44:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 770 interpolants. [2022-03-20 03:44:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295298, Invalid=296832, Unknown=0, NotChecked=0, Total=592130 [2022-03-20 03:44:55,270 INFO L87 Difference]: Start difference. First operand 776 states and 776 transitions. Second operand has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:47:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:47:35,450 INFO L93 Difference]: Finished difference Result 1544 states and 1544 transitions. [2022-03-20 03:47:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 769 states. [2022-03-20 03:47:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 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 775 [2022-03-20 03:47:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:47:35,458 INFO L225 Difference]: With dead ends: 1544 [2022-03-20 03:47:35,458 INFO L226 Difference]: Without dead ends: 1544 [2022-03-20 03:47:35,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2702 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 1534 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368440 ImplicationChecksByTransitivity, 257.1s TimeCoverageRelationStatistics Valid=884353, Invalid=1473407, Unknown=0, NotChecked=0, Total=2357760 [2022-03-20 03:47:35,598 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 1538 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 1156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 03:47:35,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1538 Valid, 58 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1156 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 03:47:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-03-20 03:47:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2022-03-20 03:47:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1539 states have (on average 1.000649772579597) internal successors, (1540), 1539 states have internal predecessors, (1540), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:47:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1544 transitions. [2022-03-20 03:47:35,621 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1544 transitions. Word has length 775 [2022-03-20 03:47:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:47:35,622 INFO L478 AbstractCegarLoop]: Abstraction has 1544 states and 1544 transitions. [2022-03-20 03:47:35,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:47:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1544 transitions. [2022-03-20 03:47:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1544 [2022-03-20 03:47:35,656 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:47:35,656 INFO L499 BasicCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:47:35,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 03:47:35,878 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,SelfDestructingSolverStorable9 [2022-03-20 03:47:35,879 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:47:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:47:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash -697320302, now seen corresponding path program 9 times [2022-03-20 03:47:35,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:47:35,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602994102] [2022-03-20 03:47:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:47:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:47:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:49:45,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:49:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:49:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:49:45,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:49:45,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602994102] [2022-03-20 03:49:45,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602994102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:49:45,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327766206] [2022-03-20 03:49:45,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:49:45,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:49:45,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:49:45,390 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) [2022-03-20 03:49:45,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 03:49:50,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 767 check-sat command(s) [2022-03-20 03:49:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:49:50,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2345 conjuncts, 768 conjunts are in the unsatisfiable core [2022-03-20 03:49:50,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:49:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:49:53,485 INFO L328 TraceCheckSpWp]: Computing backward predicates...