/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-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:01:26,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:01:26,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:01:26,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:01:26,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:01:26,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:01:26,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:01:26,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:01:26,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:01:26,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:01:26,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:01:26,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:01:26,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:01:26,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:01:26,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:01:26,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:01:26,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:01:26,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:01:26,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:01:26,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:01:26,312 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:01:26,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:01:26,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:01:26,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:01:26,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:01:26,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 22:01:26,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:01:26,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:01:26,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:01:26,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:01:26,348 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:01:26,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:01:26,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:01:26,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:01:26,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:01:26,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:01:26,350 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:01:26,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:01:26,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:01:26,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:01:26,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:01:26,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:01:26,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:01:26,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:01:26,351 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:01:26,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:01:26,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:01:26,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:01:26,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:01:26,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:01:26,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:01:26,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:01:26,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:01:26,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:01:26,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:01:26,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:01:26,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:01:26,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:01:26,353 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:01:26,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:01:26,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:01:26,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:01:26,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:01:26,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:01:26,580 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:01:26,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2022-03-18 22:01:26,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a219511a3/a5128c2c1f1545f0b31d5e99dd98bb3a/FLAG49b84084b [2022-03-18 22:01:26,988 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:01:26,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i [2022-03-18 22:01:26,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a219511a3/a5128c2c1f1545f0b31d5e99dd98bb3a/FLAG49b84084b [2022-03-18 22:01:27,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a219511a3/a5128c2c1f1545f0b31d5e99dd98bb3a [2022-03-18 22:01:27,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:01:27,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:01:27,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:01:27,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:01:27,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:01:27,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b0e76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27, skipping insertion in model container [2022-03-18 22:01:27,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:01:27,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:01:27,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i[891,904] [2022-03-18 22:01:27,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:01:27,171 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:01:27,179 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i[891,904] [2022-03-18 22:01:27,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:01:27,193 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:01:27,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27 WrapperNode [2022-03-18 22:01:27,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:01:27,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:01:27,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:01:27,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:01:27,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:01:27,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:01:27,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:01:27,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:01:27,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:01:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:27,251 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) [2022-03-18 22:01:27,254 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 [2022-03-18 22:01:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:01:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:01:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:01:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 22:01:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:01:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:01:27,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 22:01:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:01:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:01:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:01:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:01:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:01:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:01:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:01:27,340 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:01:27,342 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:01:27,452 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:01:27,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:01:27,455 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 22:01:27,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:01:27 BoogieIcfgContainer [2022-03-18 22:01:27,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:01:27,458 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:01:27,469 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:01:27,471 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:01:27,473 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:01:27" (1/1) ... [2022-03-18 22:01:27,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:01:27 BasicIcfg [2022-03-18 22:01:27,488 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:01:27,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:01:27,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:01:27,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:01:27,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:01:27" (1/4) ... [2022-03-18 22:01:27,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61af99d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:01:27, skipping insertion in model container [2022-03-18 22:01:27,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:01:27" (2/4) ... [2022-03-18 22:01:27,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61af99d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:01:27, skipping insertion in model container [2022-03-18 22:01:27,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:01:27" (3/4) ... [2022-03-18 22:01:27,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61af99d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:01:27, skipping insertion in model container [2022-03-18 22:01:27,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:01:27" (4/4) ... [2022-03-18 22:01:27,504 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.iqvasr [2022-03-18 22:01:27,508 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:01:27,508 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:01:27,539 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:01:27,545 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 [2022-03-18 22:01:27,545 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:01:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:01:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 22:01:27,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:27,561 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:27,561 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1527693123, now seen corresponding path program 1 times [2022-03-18 22:01:27,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:27,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170948672] [2022-03-18 22:01:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:27,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:27,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:27,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170948672] [2022-03-18 22:01:27,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170948672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:01:27,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:01:27,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 22:01:27,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559268223] [2022-03-18 22:01:27,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:01:27,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 22:01:27,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 22:01:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:01:27,756 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:27,796 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-03-18 22:01:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 22:01:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 22:01:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:27,806 INFO L225 Difference]: With dead ends: 33 [2022-03-18 22:01:27,806 INFO L226 Difference]: Without dead ends: 14 [2022-03-18 22:01:27,809 INFO L911 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 [2022-03-18 22:01:27,812 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:27,813 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:01:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-18 22:01:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-18 22:01:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-18 22:01:27,841 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-03-18 22:01:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:27,841 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-18 22:01:27,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-18 22:01:27,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 22:01:27,842 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:27,843 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:27,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:01:27,843 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:27,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1526769602, now seen corresponding path program 1 times [2022-03-18 22:01:27,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:27,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441956556] [2022-03-18 22:01:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:27,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:28,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:28,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441956556] [2022-03-18 22:01:28,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441956556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:01:28,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:01:28,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 22:01:28,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759928133] [2022-03-18 22:01:28,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:01:28,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 22:01:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 22:01:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-18 22:01:28,042 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:28,126 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-18 22:01:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:01:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 22:01:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:28,127 INFO L225 Difference]: With dead ends: 21 [2022-03-18 22:01:28,128 INFO L226 Difference]: Without dead ends: 16 [2022-03-18 22:01:28,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-18 22:01:28,134 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:28,135 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:01:28,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-18 22:01:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-18 22:01:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-18 22:01:28,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-03-18 22:01:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:28,149 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-18 22:01:28,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-18 22:01:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 22:01:28,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:28,150 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:28,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 22:01:28,150 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1730344036, now seen corresponding path program 1 times [2022-03-18 22:01:28,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:28,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136342471] [2022-03-18 22:01:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:28,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:28,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:28,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:28,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136342471] [2022-03-18 22:01:28,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136342471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:01:28,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39127826] [2022-03-18 22:01:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:28,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:28,259 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) [2022-03-18 22:01:28,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:01:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 22:01:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:01:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:28,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:01:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:28,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39127826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:01:28,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:01:28,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-18 22:01:28,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295378528] [2022-03-18 22:01:28,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:01:28,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 22:01:28,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:28,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 22:01:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-18 22:01:28,594 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:28,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:28,700 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-03-18 22:01:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 22:01:28,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 22:01:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:28,701 INFO L225 Difference]: With dead ends: 26 [2022-03-18 22:01:28,701 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 22:01:28,703 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-18 22:01:28,705 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:28,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:01:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 22:01:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-18 22:01:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-18 22:01:28,713 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2022-03-18 22:01:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:28,713 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-18 22:01:28,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-18 22:01:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 22:01:28,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:28,715 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:28,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 22:01:28,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:28,929 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash -349607754, now seen corresponding path program 2 times [2022-03-18 22:01:28,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:28,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596551692] [2022-03-18 22:01:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:28,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:28,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:29,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:29,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596551692] [2022-03-18 22:01:29,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596551692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:01:29,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036753925] [2022-03-18 22:01:29,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:01:29,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:29,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:29,019 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) [2022-03-18 22:01:29,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:01:29,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:01:29,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:01:29,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 22:01:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:01:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:29,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:01:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:29,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036753925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:01:29,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:01:29,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-18 22:01:29,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658339310] [2022-03-18 22:01:29,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:01:29,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 22:01:29,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 22:01:29,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-03-18 22:01:29,287 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:29,508 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-18 22:01:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 22:01:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-18 22:01:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:29,509 INFO L225 Difference]: With dead ends: 36 [2022-03-18 22:01:29,509 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 22:01:29,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-03-18 22:01:29,510 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:29,510 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:01:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 22:01:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 22:01:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-18 22:01:29,514 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 20 [2022-03-18 22:01:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:29,514 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-18 22:01:29,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-18 22:01:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 22:01:29,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:29,515 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:29,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:01:29,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 22:01:29,732 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash 751745164, now seen corresponding path program 3 times [2022-03-18 22:01:29,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:29,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671818013] [2022-03-18 22:01:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:29,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:29,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:29,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671818013] [2022-03-18 22:01:29,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671818013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:01:29,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501907556] [2022-03-18 22:01:29,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:01:29,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:29,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:29,864 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) [2022-03-18 22:01:29,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:01:29,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-18 22:01:29,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:01:29,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 22:01:29,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:01:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:30,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:01:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:30,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501907556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:01:30,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:01:30,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2022-03-18 22:01:30,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185614966] [2022-03-18 22:01:30,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:01:30,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 22:01:30,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 22:01:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-03-18 22:01:30,332 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:30,930 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2022-03-18 22:01:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 22:01:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 22:01:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:30,931 INFO L225 Difference]: With dead ends: 56 [2022-03-18 22:01:30,931 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 22:01:30,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=706, Invalid=1550, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 22:01:30,932 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:30,933 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 34 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:01:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 22:01:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-18 22:01:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-18 22:01:30,938 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 30 [2022-03-18 22:01:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:30,938 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-18 22:01:30,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-18 22:01:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 22:01:30,945 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:30,945 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:30,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:01:31,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:31,164 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 659537336, now seen corresponding path program 4 times [2022-03-18 22:01:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:31,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862782737] [2022-03-18 22:01:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:31,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:31,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:31,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:31,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862782737] [2022-03-18 22:01:31,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862782737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:01:31,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226745872] [2022-03-18 22:01:31,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:01:31,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:31,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:31,433 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) [2022-03-18 22:01:31,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:01:31,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:01:31,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:01:31,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 22:01:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:01:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:31,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:01:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:32,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226745872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:01:32,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:01:32,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 47 [2022-03-18 22:01:32,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478090307] [2022-03-18 22:01:32,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:01:32,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 22:01:32,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:32,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 22:01:32,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1491, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 22:01:32,422 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:34,008 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2022-03-18 22:01:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 22:01:34,008 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-18 22:01:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:34,009 INFO L225 Difference]: With dead ends: 96 [2022-03-18 22:01:34,009 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 22:01:34,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2491, Invalid=5165, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 22:01:34,012 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:34,012 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 49 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:01:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 22:01:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-18 22:01:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-18 22:01:34,019 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 50 [2022-03-18 22:01:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:34,019 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-18 22:01:34,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-18 22:01:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 22:01:34,020 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:34,020 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:34,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 22:01:34,236 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:34,237 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash -263856624, now seen corresponding path program 5 times [2022-03-18 22:01:34,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:34,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524740990] [2022-03-18 22:01:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:34,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:34,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:34,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524740990] [2022-03-18 22:01:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524740990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:01:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413968469] [2022-03-18 22:01:34,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:01:34,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:34,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:34,984 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) [2022-03-18 22:01:34,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:01:35,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-03-18 22:01:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:01:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 22:01:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:01:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:36,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:01:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413968469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:01:38,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:01:38,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2022-03-18 22:01:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401461242] [2022-03-18 22:01:38,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:01:38,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 22:01:38,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 22:01:38,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2170, Invalid=8542, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 22:01:38,372 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:47,390 INFO L93 Difference]: Finished difference Result 176 states and 215 transitions. [2022-03-18 22:01:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 22:01:47,391 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-18 22:01:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:47,392 INFO L225 Difference]: With dead ends: 176 [2022-03-18 22:01:47,392 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 22:01:47,398 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6310 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=9387, Invalid=24653, Unknown=0, NotChecked=0, Total=34040 [2022-03-18 22:01:47,398 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 261 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:47,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 134 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:01:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 22:01:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-18 22:01:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2022-03-18 22:01:47,411 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 90 [2022-03-18 22:01:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:47,411 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2022-03-18 22:01:47,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:01:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2022-03-18 22:01:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-18 22:01:47,413 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:47,413 INFO L500 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:47,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:01:47,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:47,616 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:47,617 INFO L85 PathProgramCache]: Analyzing trace with hash 689338048, now seen corresponding path program 6 times [2022-03-18 22:01:47,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:47,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095182883] [2022-03-18 22:01:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:47,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:50,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095182883] [2022-03-18 22:01:50,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095182883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:01:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986884620] [2022-03-18 22:01:50,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:01:50,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:50,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:50,087 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) [2022-03-18 22:01:50,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:01:50,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2022-03-18 22:01:50,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:01:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-18 22:01:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:01:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:50,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:01:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:01:57,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986884620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:01:57,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:01:57,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 167 [2022-03-18 22:01:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951598375] [2022-03-18 22:01:57,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:01:57,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-03-18 22:01:57,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-03-18 22:01:57,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9821, Invalid=17901, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 22:01:57,966 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:02:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:02:19,824 INFO L93 Difference]: Finished difference Result 336 states and 415 transitions. [2022-03-18 22:02:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-03-18 22:02:19,824 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-03-18 22:02:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:02:19,826 INFO L225 Difference]: With dead ends: 336 [2022-03-18 22:02:19,826 INFO L226 Difference]: Without dead ends: 331 [2022-03-18 22:02:19,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16602 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=36301, Invalid=70955, Unknown=0, NotChecked=0, Total=107256 [2022-03-18 22:02:19,832 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 717 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:02:19,833 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 39 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 22:02:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-18 22:02:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-03-18 22:02:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0030674846625767) internal successors, (327), 326 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:02:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2022-03-18 22:02:19,859 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 170 [2022-03-18 22:02:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:02:19,860 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2022-03-18 22:02:19,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:02:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2022-03-18 22:02:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-03-18 22:02:19,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:02:19,867 INFO L500 BasicCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:02:19,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 22:02:20,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:02:20,068 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:02:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:02:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash -756479968, now seen corresponding path program 7 times [2022-03-18 22:02:20,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:02:20,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034752347] [2022-03-18 22:02:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:02:20,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:02:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:29,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:02:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:02:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:02:29,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034752347] [2022-03-18 22:02:29,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034752347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:02:29,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804299266] [2022-03-18 22:02:29,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:02:29,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:02:29,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:02:29,076 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) [2022-03-18 22:02:29,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 22:02:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 162 conjunts are in the unsatisfiable core [2022-03-18 22:02:32,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:02:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:02:33,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:02:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:02:59,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804299266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:02:59,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:02:59,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 163, 163] total 327 [2022-03-18 22:02:59,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187757365] [2022-03-18 22:02:59,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:02:59,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 327 states [2022-03-18 22:02:59,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:02:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 327 interpolants. [2022-03-18 22:02:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38821, Invalid=67781, Unknown=0, NotChecked=0, Total=106602 [2022-03-18 22:02:59,188 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:04:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:04:50,596 INFO L93 Difference]: Finished difference Result 656 states and 815 transitions. [2022-03-18 22:04:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2022-03-18 22:04:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-03-18 22:04:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:04:50,599 INFO L225 Difference]: With dead ends: 656 [2022-03-18 22:04:50,599 INFO L226 Difference]: Without dead ends: 651 [2022-03-18 22:04:50,625 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1145 GetRequests, 498 SyntacticMatches, 1 SemanticMatches, 646 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65202 ImplicationChecksByTransitivity, 141.0s TimeCoverageRelationStatistics Valid=142981, Invalid=276275, Unknown=0, NotChecked=0, Total=419256 [2022-03-18 22:04:50,626 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 1439 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 22:04:50,626 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 54 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 22:04:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-18 22:04:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2022-03-18 22:04:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 646 states have (on average 1.001547987616099) internal successors, (647), 646 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:04:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 651 transitions. [2022-03-18 22:04:50,652 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 651 transitions. Word has length 330 [2022-03-18 22:04:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:04:50,652 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 651 transitions. [2022-03-18 22:04:50,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:04:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 651 transitions. [2022-03-18 22:04:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-03-18 22:04:50,661 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:04:50,662 INFO L500 BasicCegarLoop]: trace histogram [319, 319, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:04:50,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 22:04:50,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:04:50,871 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:04:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:04:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 743680736, now seen corresponding path program 8 times [2022-03-18 22:04:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:04:50,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322163741] [2022-03-18 22:04:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:04:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:04:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:05:25,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:05:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:05:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:05:25,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:05:25,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322163741] [2022-03-18 22:05:25,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322163741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:05:25,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114645465] [2022-03-18 22:05:25,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:05:25,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:05:25,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:05:25,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:05:25,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 22:05:41,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:05:41,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:05:52,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 322 conjunts are in the unsatisfiable core [2022-03-18 22:05:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:05:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:05:54,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:07:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:07:35,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114645465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:07:35,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:07:35,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [324, 323, 323] total 647 [2022-03-18 22:07:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566141610] [2022-03-18 22:07:35,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:07:35,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 647 states [2022-03-18 22:07:35,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:07:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 647 interpolants. [2022-03-18 22:07:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154421, Invalid=263541, Unknown=0, NotChecked=0, Total=417962 [2022-03-18 22:07:35,964 INFO L87 Difference]: Start difference. First operand 651 states and 651 transitions. Second operand has 647 states, 647 states have (on average 1.998454404945904) internal successors, (1293), 646 states have internal predecessors, (1293), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)