/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:05:07,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:05:07,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:05:07,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 09:05:07,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:05:07,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:05:07,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:05:07,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:05:07,082 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:05:07,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:05:07,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:05:07,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:05:07,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:05:07,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:05:07,084 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:05:07,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:05:07,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:05:07,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:05:07,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:05:07,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:05:07,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:05:07,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:05:07,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:05:07,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:05:07,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:05:07,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:05:07,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:05:07,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:05:07,086 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:05:07,086 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:05:07,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:05:07,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:05:07,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:05:07,289 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:05:07,289 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:05:07,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_5.c [2022-03-20 09:05:07,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59ee46b78/21e9d07ad7114f3fbaee5e7c131a369d/FLAGbf08a68e1 [2022-03-20 09:05:07,688 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:05:07,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c [2022-03-20 09:05:07,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59ee46b78/21e9d07ad7114f3fbaee5e7c131a369d/FLAGbf08a68e1 [2022-03-20 09:05:07,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59ee46b78/21e9d07ad7114f3fbaee5e7c131a369d [2022-03-20 09:05:07,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:05:07,708 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:05:07,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:05:07,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:05:07,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:05:07,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d276f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07, skipping insertion in model container [2022-03-20 09:05:07,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:05:07,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:05:07,902 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-simple/nested_5.c[899,912] [2022-03-20 09:05:07,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:05:07,910 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:05:07,927 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-simple/nested_5.c[899,912] [2022-03-20 09:05:07,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:05:07,936 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:05:07,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07 WrapperNode [2022-03-20 09:05:07,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:05:07,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:05:07,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:05:07,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:05:07,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:05:07,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:05:07,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:05:07,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:05:07,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (1/1) ... [2022-03-20 09:05:07,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:05:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:07,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 09:05:08,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 09:05:08,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:05:08,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:05:08,029 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:05:08,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:05:08,029 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:05:08,029 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:05:08,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:05:08,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:05:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:05:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:05:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:05:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:05:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:05:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:05:08,068 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:05:08,069 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:05:08,169 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:05:08,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:05:08,173 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-20 09:05:08,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:05:08 BoogieIcfgContainer [2022-03-20 09:05:08,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:05:08,175 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:05:08,175 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:05:08,175 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:05:08,177 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:05:08" (1/1) ... [2022-03-20 09:05:08,179 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:05:08,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:05:08 BasicIcfg [2022-03-20 09:05:08,187 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:05:08,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:05:08,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:05:08,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:05:08,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:05:07" (1/4) ... [2022-03-20 09:05:08,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a553ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:05:08, skipping insertion in model container [2022-03-20 09:05:08,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:05:07" (2/4) ... [2022-03-20 09:05:08,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a553ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:05:08, skipping insertion in model container [2022-03-20 09:05:08,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:05:08" (3/4) ... [2022-03-20 09:05:08,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a553ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:05:08, skipping insertion in model container [2022-03-20 09:05:08,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:05:08" (4/4) ... [2022-03-20 09:05:08,192 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_5.cqvasr [2022-03-20 09:05:08,195 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:05:08,195 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:05:08,223 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:05:08,229 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 09:05:08,230 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:05:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:05:08,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-20 09:05:08,245 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:08,245 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:08,246 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2087165565, now seen corresponding path program 1 times [2022-03-20 09:05:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:08,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736367639] [2022-03-20 09:05:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:08,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736367639] [2022-03-20 09:05:08,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736367639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:05:08,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:05:08,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:05:08,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701676612] [2022-03-20 09:05:08,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:05:08,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:05:08,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:08,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:05:08,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:05:08,426 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:08,446 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-03-20 09:05:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:05:08,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-20 09:05:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:08,452 INFO L225 Difference]: With dead ends: 42 [2022-03-20 09:05:08,452 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 09:05:08,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:05:08,456 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:08,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:05:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 09:05:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-20 09:05:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-03-20 09:05:08,483 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-03-20 09:05:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:08,484 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-03-20 09:05:08,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-03-20 09:05:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-20 09:05:08,484 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:08,484 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:08,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:05:08,485 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2087166526, now seen corresponding path program 1 times [2022-03-20 09:05:08,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270345640] [2022-03-20 09:05:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:08,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:08,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:08,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270345640] [2022-03-20 09:05:08,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270345640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:05:08,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:05:08,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:05:08,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642507563] [2022-03-20 09:05:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:05:08,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 09:05:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 09:05:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:05:08,551 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:08,599 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-03-20 09:05:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 09:05:08,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-20 09:05:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:08,600 INFO L225 Difference]: With dead ends: 32 [2022-03-20 09:05:08,601 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 09:05:08,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:05:08,602 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:08,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:05:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 09:05:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-03-20 09:05:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-20 09:05:08,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-03-20 09:05:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:08,606 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-20 09:05:08,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-20 09:05:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 09:05:08,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:08,607 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:08,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 09:05:08,607 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash 568010400, now seen corresponding path program 1 times [2022-03-20 09:05:08,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:08,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535473933] [2022-03-20 09:05:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:08,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:08,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:08,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535473933] [2022-03-20 09:05:08,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535473933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:05:08,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:05:08,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:05:08,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14385133] [2022-03-20 09:05:08,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:05:08,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 09:05:08,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:08,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 09:05:08,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:05:08,653 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:08,711 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-20 09:05:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 09:05:08,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 09:05:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:08,712 INFO L225 Difference]: With dead ends: 41 [2022-03-20 09:05:08,712 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 09:05:08,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:05:08,713 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:08,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:05:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 09:05:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-03-20 09:05:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-20 09:05:08,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-03-20 09:05:08,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:08,718 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-20 09:05:08,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-20 09:05:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 09:05:08,719 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:08,719 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:08,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 09:05:08,719 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash -918082799, now seen corresponding path program 1 times [2022-03-20 09:05:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:08,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843544349] [2022-03-20 09:05:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:08,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:08,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:08,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843544349] [2022-03-20 09:05:08,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843544349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:05:08,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:05:08,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:05:08,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025334064] [2022-03-20 09:05:08,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:05:08,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 09:05:08,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 09:05:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:05:08,806 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:08,863 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-03-20 09:05:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 09:05:08,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 09:05:08,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:08,865 INFO L225 Difference]: With dead ends: 41 [2022-03-20 09:05:08,866 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 09:05:08,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:05:08,867 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:08,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:05:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 09:05:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-03-20 09:05:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-03-20 09:05:08,871 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-03-20 09:05:08,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:08,872 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-03-20 09:05:08,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,872 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-03-20 09:05:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 09:05:08,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:08,875 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:08,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 09:05:08,875 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1067555700, now seen corresponding path program 1 times [2022-03-20 09:05:08,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:08,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282984828] [2022-03-20 09:05:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:08,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282984828] [2022-03-20 09:05:08,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282984828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:05:08,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:05:08,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:05:08,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440547464] [2022-03-20 09:05:08,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:05:08,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 09:05:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 09:05:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:05:08,924 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:08,957 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-20 09:05:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 09:05:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 09:05:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:08,958 INFO L225 Difference]: With dead ends: 41 [2022-03-20 09:05:08,958 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 09:05:08,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:05:08,959 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:08,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:05:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 09:05:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-03-20 09:05:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-20 09:05:08,963 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2022-03-20 09:05:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:08,964 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-20 09:05:08,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-20 09:05:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 09:05:08,964 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:08,964 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:08,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 09:05:08,965 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash -495476152, now seen corresponding path program 1 times [2022-03-20 09:05:08,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:08,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782164843] [2022-03-20 09:05:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:09,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782164843] [2022-03-20 09:05:09,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782164843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:05:09,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:05:09,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:05:09,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458821079] [2022-03-20 09:05:09,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:05:09,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 09:05:09,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:09,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 09:05:09,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:05:09,023 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:09,069 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-20 09:05:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 09:05:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 09:05:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:09,070 INFO L225 Difference]: With dead ends: 41 [2022-03-20 09:05:09,070 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 09:05:09,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:05:09,071 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:09,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:05:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 09:05:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-20 09:05:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-03-20 09:05:09,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 21 [2022-03-20 09:05:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:09,077 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-03-20 09:05:09,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-03-20 09:05:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:05:09,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:09,078 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:09,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 09:05:09,078 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1040068038, now seen corresponding path program 1 times [2022-03-20 09:05:09,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:09,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336004968] [2022-03-20 09:05:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:09,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:09,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:09,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336004968] [2022-03-20 09:05:09,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336004968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:09,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495689505] [2022-03-20 09:05:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:09,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:09,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:09,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:09,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:05:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 09:05:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:09,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:09,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495689505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:09,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:09,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 09:05:09,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039088190] [2022-03-20 09:05:09,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:09,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:05:09,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:05:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:05:09,339 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:09,414 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-20 09:05:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:05:09,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 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 23 [2022-03-20 09:05:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:09,418 INFO L225 Difference]: With dead ends: 47 [2022-03-20 09:05:09,418 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 09:05:09,419 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:05:09,424 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:09,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:05:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 09:05:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 09:05:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-20 09:05:09,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-03-20 09:05:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:09,434 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-20 09:05:09,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-20 09:05:09,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 09:05:09,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:09,436 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:09,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:09,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:09,644 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash -758389952, now seen corresponding path program 2 times [2022-03-20 09:05:09,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:09,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803696949] [2022-03-20 09:05:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:09,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 09:05:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803696949] [2022-03-20 09:05:09,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803696949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575189185] [2022-03-20 09:05:09,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:05:09,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:09,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:09,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:09,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:05:09,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:05:09,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:09,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 09:05:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:09,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:05:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575189185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:09,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:09,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 11 [2022-03-20 09:05:09,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621434066] [2022-03-20 09:05:09,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:09,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 09:05:09,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 09:05:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:05:09,901 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:10,205 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2022-03-20 09:05:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:05:10,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 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 29 [2022-03-20 09:05:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:10,206 INFO L225 Difference]: With dead ends: 86 [2022-03-20 09:05:10,206 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 09:05:10,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-20 09:05:10,207 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:10,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 41 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:05:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 09:05:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-03-20 09:05:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-03-20 09:05:10,214 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 29 [2022-03-20 09:05:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:10,214 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-03-20 09:05:10,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-03-20 09:05:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 09:05:10,215 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:10,215 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:10,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:10,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-20 09:05:10,431 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash 329949812, now seen corresponding path program 3 times [2022-03-20 09:05:10,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:10,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977369243] [2022-03-20 09:05:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:10,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:10,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-20 09:05:10,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:10,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977369243] [2022-03-20 09:05:10,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977369243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:10,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119425979] [2022-03-20 09:05:10,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:05:10,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:10,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:10,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:05:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 09:05:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 09:05:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 09:05:10,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 09:05:10,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119425979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:10,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:10,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-20 09:05:10,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322695392] [2022-03-20 09:05:10,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:10,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 09:05:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 09:05:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:05:10,708 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:10,889 INFO L93 Difference]: Finished difference Result 468 states and 524 transitions. [2022-03-20 09:05:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 09:05:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 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 48 [2022-03-20 09:05:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:10,894 INFO L225 Difference]: With dead ends: 468 [2022-03-20 09:05:10,894 INFO L226 Difference]: Without dead ends: 426 [2022-03-20 09:05:10,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2022-03-20 09:05:10,896 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 331 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:10,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 31 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:05:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-20 09:05:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 298. [2022-03-20 09:05:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 294 states have (on average 1.1122448979591837) internal successors, (327), 294 states have internal predecessors, (327), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 330 transitions. [2022-03-20 09:05:10,946 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 330 transitions. Word has length 48 [2022-03-20 09:05:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:10,946 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 330 transitions. [2022-03-20 09:05:10,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 330 transitions. [2022-03-20 09:05:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-03-20 09:05:10,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:10,956 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:10,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:11,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:11,167 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:11,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1503345398, now seen corresponding path program 4 times [2022-03-20 09:05:11,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:11,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883234227] [2022-03-20 09:05:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:11,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 4294 proven. 1 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2022-03-20 09:05:11,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:11,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883234227] [2022-03-20 09:05:11,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883234227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:11,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861767049] [2022-03-20 09:05:11,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:05:11,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:11,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:11,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:11,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:05:11,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:05:11,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:11,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 09:05:11,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-03-20 09:05:11,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-03-20 09:05:12,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861767049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:12,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:12,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-20 09:05:12,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423284299] [2022-03-20 09:05:12,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:12,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 09:05:12,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:12,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 09:05:12,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:05:12,153 INFO L87 Difference]: Start difference. First operand 298 states and 330 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:12,509 INFO L93 Difference]: Finished difference Result 2576 states and 2892 transitions. [2022-03-20 09:05:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:05:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 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 297 [2022-03-20 09:05:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:12,515 INFO L225 Difference]: With dead ends: 2576 [2022-03-20 09:05:12,516 INFO L226 Difference]: Without dead ends: 2286 [2022-03-20 09:05:12,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-20 09:05:12,518 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 230 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:12,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 36 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:05:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-03-20 09:05:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1534. [2022-03-20 09:05:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1530 states have (on average 1.0816993464052287) internal successors, (1655), 1530 states have internal predecessors, (1655), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 1658 transitions. [2022-03-20 09:05:12,617 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 1658 transitions. Word has length 297 [2022-03-20 09:05:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:12,617 INFO L478 AbstractCegarLoop]: Abstraction has 1534 states and 1658 transitions. [2022-03-20 09:05:12,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 1658 transitions. [2022-03-20 09:05:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1534 [2022-03-20 09:05:12,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:12,655 INFO L499 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:12,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:12,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:12,872 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash -651169602, now seen corresponding path program 5 times [2022-03-20 09:05:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:12,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082719191] [2022-03-20 09:05:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:12,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:13,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 88166 proven. 3149 refuted. 0 times theorem prover too weak. 311023 trivial. 0 not checked. [2022-03-20 09:05:13,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:13,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082719191] [2022-03-20 09:05:13,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082719191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:13,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862989814] [2022-03-20 09:05:13,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:05:13,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:13,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:13,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:13,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:05:13,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-03-20 09:05:13,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 09:05:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-03-20 09:05:15,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-03-20 09:05:17,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862989814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:17,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:17,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 09:05:17,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143524756] [2022-03-20 09:05:17,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:17,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 09:05:17,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 09:05:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:05:17,050 INFO L87 Difference]: Start difference. First operand 1534 states and 1658 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:17,390 INFO L93 Difference]: Finished difference Result 5849 states and 6338 transitions. [2022-03-20 09:05:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:05:17,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 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 1533 [2022-03-20 09:05:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:17,403 INFO L225 Difference]: With dead ends: 5849 [2022-03-20 09:05:17,403 INFO L226 Difference]: Without dead ends: 4510 [2022-03-20 09:05:17,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3078 GetRequests, 3064 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 09:05:17,405 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:17,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 33 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:05:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-03-20 09:05:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2022-03-20 09:05:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4506 states have (on average 1.0774522858411009) internal successors, (4855), 4506 states have internal predecessors, (4855), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 4858 transitions. [2022-03-20 09:05:17,690 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 4858 transitions. Word has length 1533 [2022-03-20 09:05:17,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:17,692 INFO L478 AbstractCegarLoop]: Abstraction has 4510 states and 4858 transitions. [2022-03-20 09:05:17,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 4858 transitions. [2022-03-20 09:05:17,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4510 [2022-03-20 09:05:17,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:17,798 INFO L499 BasicCegarLoop]: trace histogram [1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:17,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:05:18,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 09:05:18,015 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:18,016 INFO L85 PathProgramCache]: Analyzing trace with hash -737065794, now seen corresponding path program 6 times [2022-03-20 09:05:18,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:18,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146481602] [2022-03-20 09:05:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:18,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:21,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:05:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:05:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359703 proven. 113309 refuted. 0 times theorem prover too weak. 2150622 trivial. 0 not checked. [2022-03-20 09:05:21,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:05:21,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146481602] [2022-03-20 09:05:21,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146481602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:05:21,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806852131] [2022-03-20 09:05:21,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 09:05:21,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:21,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:05:21,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:05:21,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:05:25,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 753 check-sat command(s) [2022-03-20 09:05:25,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:05:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 5371 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 09:05:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:05:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-03-20 09:05:30,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:05:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-03-20 09:05:34,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806852131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:05:34,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:05:34,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 09:05:34,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276155568] [2022-03-20 09:05:34,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:05:34,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 09:05:34,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:05:34,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 09:05:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:05:34,596 INFO L87 Difference]: Start difference. First operand 4510 states and 4858 transitions. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:35,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:05:35,465 INFO L93 Difference]: Finished difference Result 16866 states and 18179 transitions. [2022-03-20 09:05:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:05:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 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 4509 [2022-03-20 09:05:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:05:35,501 INFO L225 Difference]: With dead ends: 16866 [2022-03-20 09:05:35,502 INFO L226 Difference]: Without dead ends: 13486 [2022-03-20 09:05:35,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9030 GetRequests, 9016 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 09:05:35,512 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:05:35,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 43 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:05:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2022-03-20 09:05:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 13486. [2022-03-20 09:05:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13486 states, 13482 states have (on average 1.0769173713098947) internal successors, (14519), 13482 states have internal predecessors, (14519), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13486 states to 13486 states and 14522 transitions. [2022-03-20 09:05:36,482 INFO L78 Accepts]: Start accepts. Automaton has 13486 states and 14522 transitions. Word has length 4509 [2022-03-20 09:05:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:05:36,484 INFO L478 AbstractCegarLoop]: Abstraction has 13486 states and 14522 transitions. [2022-03-20 09:05:36,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:05:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 13486 states and 14522 transitions. [2022-03-20 09:05:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13486 [2022-03-20 09:05:37,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:05:37,367 INFO L499 BasicCegarLoop]: trace histogram [5184, 5184, 864, 864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:05:37,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 09:05:37,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:05:37,568 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:05:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:05:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1057330878, now seen corresponding path program 7 times [2022-03-20 09:05:37,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:05:37,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243123793] [2022-03-20 09:05:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:05:37,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:05:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:17,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:06:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-20 09:06:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:06:18,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243123793] [2022-03-20 09:06:18,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243123793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:06:18,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122290934] [2022-03-20 09:06:18,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 09:06:18,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:06:18,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:06:18,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:06:18,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:06:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:06:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 21820 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 09:06:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:06:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-20 09:06:42,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:07:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-20 09:07:04,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122290934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:07:04,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 09:07:04,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-20 09:07:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883966581] [2022-03-20 09:07:04,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 09:07:04,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 09:07:04,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:07:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 09:07:04,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:07:04,190 INFO L87 Difference]: Start difference. First operand 13486 states and 14522 transitions. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:07:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:07:05,368 INFO L93 Difference]: Finished difference Result 20227 states and 21782 transitions. [2022-03-20 09:07:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:07:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 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 13485 [2022-03-20 09:07:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:07:05,438 INFO L225 Difference]: With dead ends: 20227 [2022-03-20 09:07:05,438 INFO L226 Difference]: Without dead ends: 20224 [2022-03-20 09:07:05,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26984 GetRequests, 26969 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 09:07:05,446 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:07:05,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 38 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:07:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2022-03-20 09:07:06,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 20224. [2022-03-20 09:07:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20224 states, 20220 states have (on average 1.0769040553907023) internal successors, (21775), 20220 states have internal predecessors, (21775), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:07:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20224 states to 20224 states and 21778 transitions. [2022-03-20 09:07:06,794 INFO L78 Accepts]: Start accepts. Automaton has 20224 states and 21778 transitions. Word has length 13485 [2022-03-20 09:07:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:07:06,802 INFO L478 AbstractCegarLoop]: Abstraction has 20224 states and 21778 transitions. [2022-03-20 09:07:06,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 09:07:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 20224 states and 21778 transitions. [2022-03-20 09:07:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20224 [2022-03-20 09:07:08,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:07:08,762 INFO L499 BasicCegarLoop]: trace histogram [7776, 7776, 1296, 1296, 1296, 216, 216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:07:08,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 09:07:08,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:07:08,963 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:07:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:07:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash 587167998, now seen corresponding path program 8 times [2022-03-20 09:07:08,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:07:08,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157167714] [2022-03-20 09:07:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:07:08,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:08:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat