/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-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 04:48:02,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 04:48:02,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 04:48:02,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 04:48:02,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 04:48:02,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 04:48:02,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 04:48:02,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 04:48:02,964 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 04:48:02,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 04:48:02,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 04:48:02,965 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 04:48:02,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 04:48:02,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 04:48:02,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 04:48:02,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 04:48:02,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 04:48:02,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 04:48:02,966 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 04:48:02,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 04:48:02,966 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 04:48:02,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 04:48:02,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 04:48:02,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 04:48:02,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 04:48:02,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 04:48:02,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:48:02,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 04:48:02,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 04:48:02,968 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 04:48:02,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 04:48:03,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 04:48:03,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 04:48:03,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 04:48:03,164 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 04:48:03,165 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 04:48:03,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-04-06 04:48:03,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9869bc5d/91b83824d8154a91a96ed01a6dbcbeb9/FLAG3540d424b [2022-04-06 04:48:03,561 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 04:48:03,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-04-06 04:48:03,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9869bc5d/91b83824d8154a91a96ed01a6dbcbeb9/FLAG3540d424b [2022-04-06 04:48:03,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9869bc5d/91b83824d8154a91a96ed01a6dbcbeb9 [2022-04-06 04:48:03,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 04:48:03,579 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 04:48:03,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 04:48:03,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 04:48:03,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 04:48:03,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41aa8f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03, skipping insertion in model container [2022-04-06 04:48:03,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 04:48:03,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 04:48:03,732 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-invgen/SpamAssassin-loop.i[893,906] [2022-04-06 04:48:03,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:48:03,755 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 04:48:03,763 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-invgen/SpamAssassin-loop.i[893,906] [2022-04-06 04:48:03,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:48:03,775 INFO L208 MainTranslator]: Completed translation [2022-04-06 04:48:03,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03 WrapperNode [2022-04-06 04:48:03,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 04:48:03,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 04:48:03,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 04:48:03,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 04:48:03,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 04:48:03,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 04:48:03,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 04:48:03,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 04:48:03,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (1/1) ... [2022-04-06 04:48:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:48:03,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:48:03,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 04:48:03,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 04:48:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 04:48:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 04:48:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 04:48:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 04:48:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 04:48:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 04:48:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 04:48:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 04:48:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 04:48:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 04:48:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 04:48:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 04:48:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 04:48:03,891 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 04:48:03,892 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 04:48:04,040 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 04:48:04,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 04:48:04,044 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 04:48:04,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:48:04 BoogieIcfgContainer [2022-04-06 04:48:04,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 04:48:04,046 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 04:48:04,046 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 04:48:04,060 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 04:48:04,062 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:48:04" (1/1) ... [2022-04-06 04:48:04,064 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 04:48:04,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:48:04 BasicIcfg [2022-04-06 04:48:04,088 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 04:48:04,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 04:48:04,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 04:48:04,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 04:48:04,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:48:03" (1/4) ... [2022-04-06 04:48:04,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da437d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:48:04, skipping insertion in model container [2022-04-06 04:48:04,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:48:03" (2/4) ... [2022-04-06 04:48:04,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da437d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:48:04, skipping insertion in model container [2022-04-06 04:48:04,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:48:04" (3/4) ... [2022-04-06 04:48:04,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da437d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:48:04, skipping insertion in model container [2022-04-06 04:48:04,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:48:04" (4/4) ... [2022-04-06 04:48:04,093 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.iJordan [2022-04-06 04:48:04,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 04:48:04,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 04:48:04,154 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 04:48:04,158 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 [2022-04-06 04:48:04,158 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 04:48:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 04:48:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 04:48:04,190 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:48:04,190 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:04,190 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:48:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:48:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash -868390563, now seen corresponding path program 1 times [2022-04-06 04:48:04,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:48:04,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223836024] [2022-04-06 04:48:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:48:04,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:48:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:04,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:48:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:48:04,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:48:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223836024] [2022-04-06 04:48:04,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223836024] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:48:04,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:48:04,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 04:48:04,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526599214] [2022-04-06 04:48:04,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:48:04,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 04:48:04,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:48:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 04:48:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 04:48:04,447 INFO L87 Difference]: Start difference. First operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:48:04,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:48:04,694 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-04-06 04:48:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 04:48:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 04:48:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:48:04,709 INFO L225 Difference]: With dead ends: 52 [2022-04-06 04:48:04,709 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 04:48:04,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 04:48:04,716 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 04:48:04,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 04:48:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 04:48:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-04-06 04:48:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 04:48:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-04-06 04:48:04,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2022-04-06 04:48:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:48:04,775 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-04-06 04:48:04,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:48:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-04-06 04:48:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 04:48:04,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:48:04,776 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:04,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 04:48:04,776 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:48:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:48:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash -867437251, now seen corresponding path program 1 times [2022-04-06 04:48:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:48:04,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989102376] [2022-04-06 04:48:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:48:04,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:48:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:04,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:48:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:48:04,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:48:04,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989102376] [2022-04-06 04:48:04,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989102376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:48:04,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:48:04,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 04:48:04,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741182361] [2022-04-06 04:48:04,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:48:04,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 04:48:04,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:48:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 04:48:04,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 04:48:04,824 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:48:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:48:04,954 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-04-06 04:48:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 04:48:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 04:48:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:48:04,956 INFO L225 Difference]: With dead ends: 53 [2022-04-06 04:48:04,956 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 04:48:04,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 04:48:04,957 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:48:04,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:48:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 04:48:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-04-06 04:48:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 04:48:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-04-06 04:48:04,980 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2022-04-06 04:48:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:48:04,980 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-04-06 04:48:04,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:48:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-04-06 04:48:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 04:48:04,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:48:04,981 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:04,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 04:48:04,981 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:48:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:48:04,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1607544442, now seen corresponding path program 1 times [2022-04-06 04:48:04,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:48:04,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130201716] [2022-04-06 04:48:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:48:04,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:48:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:48:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 04:48:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:48:05,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:48:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130201716] [2022-04-06 04:48:05,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130201716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:48:05,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:48:05,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 04:48:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184870255] [2022-04-06 04:48:05,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:48:05,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 04:48:05,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:48:05,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 04:48:05,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 04:48:05,033 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 04:48:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:48:05,152 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-04-06 04:48:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 04:48:05,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-04-06 04:48:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:48:05,153 INFO L225 Difference]: With dead ends: 55 [2022-04-06 04:48:05,153 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 04:48:05,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 04:48:05,154 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:48:05,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:48:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 04:48:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 04:48:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 04:48:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-04-06 04:48:05,159 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2022-04-06 04:48:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:48:05,159 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-04-06 04:48:05,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 04:48:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-04-06 04:48:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 04:48:05,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:48:05,160 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:05,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 04:48:05,161 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:48:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:48:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1153064602, now seen corresponding path program 1 times [2022-04-06 04:48:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:48:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45997505] [2022-04-06 04:48:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:48:05,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:48:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:48:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 04:48:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:48:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:48:05,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:48:05,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45997505] [2022-04-06 04:48:05,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45997505] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:48:05,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:48:05,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 04:48:05,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953049880] [2022-04-06 04:48:05,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:48:05,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 04:48:05,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:48:05,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 04:48:05,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 04:48:05,219 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 04:48:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:48:05,367 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-04-06 04:48:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 04:48:05,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-06 04:48:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:48:05,368 INFO L225 Difference]: With dead ends: 59 [2022-04-06 04:48:05,368 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 04:48:05,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 04:48:05,369 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:48:05,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 59 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:48:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 04:48:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-04-06 04:48:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 04:48:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-04-06 04:48:05,374 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2022-04-06 04:48:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:48:05,374 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-04-06 04:48:05,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 04:48:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-04-06 04:48:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 04:48:05,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:48:05,375 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:05,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 04:48:05,375 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:48:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:48:05,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1359459551, now seen corresponding path program 1 times [2022-04-06 04:48:05,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:48:05,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224251788] [2022-04-06 04:48:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:48:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:48:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:48:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 04:48:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:48:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 04:48:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 04:48:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:48:05,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224251788] [2022-04-06 04:48:05,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224251788] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:48:05,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:48:05,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 04:48:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494518252] [2022-04-06 04:48:05,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:48:05,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 04:48:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:48:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 04:48:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 04:48:05,425 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 04:48:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:48:05,559 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-04-06 04:48:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 04:48:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-06 04:48:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:48:05,560 INFO L225 Difference]: With dead ends: 64 [2022-04-06 04:48:05,560 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 04:48:05,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 04:48:05,561 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:48:05,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:48:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 04:48:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 04:48:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 04:48:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-04-06 04:48:05,565 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2022-04-06 04:48:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:48:05,565 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-04-06 04:48:05,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 04:48:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-04-06 04:48:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 04:48:05,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:48:05,567 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:05,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 04:48:05,567 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:48:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:48:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1056918318, now seen corresponding path program 1 times [2022-04-06 04:48:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:48:05,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734651867] [2022-04-06 04:48:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:48:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:48:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:48:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 04:48:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:48:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 04:48:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 04:48:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 04:48:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 04:48:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 04:48:05,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:48:05,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734651867] [2022-04-06 04:48:05,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734651867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:48:05,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:48:05,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 04:48:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739986736] [2022-04-06 04:48:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:48:05,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 04:48:05,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:48:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 04:48:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 04:48:05,639 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 04:48:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:48:05,801 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-04-06 04:48:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 04:48:05,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-06 04:48:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:48:05,804 INFO L225 Difference]: With dead ends: 73 [2022-04-06 04:48:05,804 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 04:48:05,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 04:48:05,805 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:48:05,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 57 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:48:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 04:48:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-04-06 04:48:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 04:48:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-04-06 04:48:05,809 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2022-04-06 04:48:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:48:05,810 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-04-06 04:48:05,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 04:48:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-04-06 04:48:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 04:48:05,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:48:05,811 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:05,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 04:48:05,811 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:48:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:48:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1366093938, now seen corresponding path program 1 times [2022-04-06 04:48:05,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:48:05,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259985923] [2022-04-06 04:48:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:48:05,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:48:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:48:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 04:48:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:48:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 04:48:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 04:48:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 04:48:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 04:48:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 04:48:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 04:48:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 04:48:05,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:48:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259985923] [2022-04-06 04:48:05,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259985923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:48:05,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:48:05,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 04:48:05,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908483776] [2022-04-06 04:48:05,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:48:05,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 04:48:05,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:48:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 04:48:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-06 04:48:05,888 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 04:48:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:48:06,039 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2022-04-06 04:48:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 04:48:06,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-04-06 04:48:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:48:06,043 INFO L225 Difference]: With dead ends: 73 [2022-04-06 04:48:06,043 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 04:48:06,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 04:48:06,044 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:48:06,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:48:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 04:48:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-04-06 04:48:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 04:48:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-04-06 04:48:06,049 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2022-04-06 04:48:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:48:06,049 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-04-06 04:48:06,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 04:48:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-04-06 04:48:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 04:48:06,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:48:06,050 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:06,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 04:48:06,050 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:48:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:48:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -430516171, now seen corresponding path program 1 times [2022-04-06 04:48:06,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:48:06,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124922136] [2022-04-06 04:48:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:48:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:48:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:48:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 04:48:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:48:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 04:48:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 04:48:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 04:48:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 04:48:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 04:48:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 04:48:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 04:48:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 04:48:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:48:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 04:48:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:48:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124922136] [2022-04-06 04:48:06,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124922136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:48:06,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:48:06,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 04:48:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796681061] [2022-04-06 04:48:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:48:06,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 04:48:06,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:48:06,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 04:48:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 04:48:06,137 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 04:48:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:48:06,300 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-04-06 04:48:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 04:48:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 68 [2022-04-06 04:48:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:48:06,301 INFO L225 Difference]: With dead ends: 71 [2022-04-06 04:48:06,301 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 04:48:06,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-04-06 04:48:06,302 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:48:06,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:48:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 04:48:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 04:48:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 04:48:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 04:48:06,303 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2022-04-06 04:48:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:48:06,303 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 04:48:06,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 04:48:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 04:48:06,303 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 04:48:06,305 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 04:48:06,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 04:48:06,308 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:48:06,309 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 04:48:06,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:48:06 BasicIcfg [2022-04-06 04:48:06,311 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 04:48:06,311 INFO L158 Benchmark]: Toolchain (without parser) took 2732.23ms. Allocated memory was 215.0MB in the beginning and 316.7MB in the end (delta: 101.7MB). Free memory was 163.6MB in the beginning and 149.7MB in the end (delta: 13.9MB). Peak memory consumption was 116.4MB. Max. memory is 8.0GB. [2022-04-06 04:48:06,311 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 215.0MB. Free memory was 179.8MB in the beginning and 179.7MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 04:48:06,312 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.58ms. Allocated memory is still 215.0MB. Free memory was 163.4MB in the beginning and 187.6MB in the end (delta: -24.2MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. [2022-04-06 04:48:06,312 INFO L158 Benchmark]: Boogie Preprocessor took 17.94ms. Allocated memory is still 215.0MB. Free memory was 187.6MB in the beginning and 186.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 04:48:06,312 INFO L158 Benchmark]: RCFGBuilder took 248.81ms. Allocated memory is still 215.0MB. Free memory was 185.9MB in the beginning and 174.1MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 04:48:06,312 INFO L158 Benchmark]: IcfgTransformer took 41.52ms. Allocated memory is still 215.0MB. Free memory was 174.1MB in the beginning and 172.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 04:48:06,312 INFO L158 Benchmark]: TraceAbstraction took 2222.12ms. Allocated memory was 215.0MB in the beginning and 316.7MB in the end (delta: 101.7MB). Free memory was 172.0MB in the beginning and 149.7MB in the end (delta: 22.3MB). Peak memory consumption was 124.4MB. Max. memory is 8.0GB. [2022-04-06 04:48:06,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 215.0MB. Free memory was 179.8MB in the beginning and 179.7MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.58ms. Allocated memory is still 215.0MB. Free memory was 163.4MB in the beginning and 187.6MB in the end (delta: -24.2MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.94ms. Allocated memory is still 215.0MB. Free memory was 187.6MB in the beginning and 186.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 248.81ms. Allocated memory is still 215.0MB. Free memory was 185.9MB in the beginning and 174.1MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 41.52ms. Allocated memory is still 215.0MB. Free memory was 174.1MB in the beginning and 172.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2222.12ms. Allocated memory was 215.0MB in the beginning and 316.7MB in the end (delta: 101.7MB). Free memory was 172.0MB in the beginning and 149.7MB in the end (delta: 22.3MB). Peak memory consumption was 124.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.2s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 250 mSDsluCounter, 459 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 489 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1489 IncrementalHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 489 mSolverCounterUnsat, 294 mSDtfsCounter, 1489 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 592 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-06 04:48:06,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...