/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:21:38,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:21:38,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:21:38,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:21:38,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:21:38,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:21:38,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:21:38,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:21:38,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:21:38,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:21:38,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:21:38,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:21:38,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:21:38,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:21:38,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:21:38,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:21:38,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:21:38,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:21:38,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:21:38,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:21:38,468 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:21:38,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:21:38,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:21:38,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:21:38,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:21:38,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 19:21:38,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:21:38,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:21:38,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:21:38,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:21:38,508 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:21:38,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:21:38,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:21:38,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:21:38,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:21:38,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:21:38,512 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:21:38,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:21:38,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:21:38,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:21:38,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:21:38,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:21:38,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:21:38,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:21:38,514 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:21:38,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:21:38,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:21:38,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:21:38,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:21:38,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:21:38,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:21:38,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:21:38,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:21:38,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:21:38,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:21:38,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:21:38,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:21:38,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:21:38,517 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:21:38,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:21:38,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:21:38,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:21:38,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:21:38,746 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:21:38,747 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:21:38,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-03-17 19:21:38,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/504caee27/49c651d6e2fc4630b9f6a8ee8dbbf0ca/FLAG91db3c0ef [2022-03-17 19:21:39,170 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:21:39,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-03-17 19:21:39,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/504caee27/49c651d6e2fc4630b9f6a8ee8dbbf0ca/FLAG91db3c0ef [2022-03-17 19:21:39,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/504caee27/49c651d6e2fc4630b9f6a8ee8dbbf0ca [2022-03-17 19:21:39,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:21:39,195 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:21:39,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:21:39,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:21:39,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:21:39,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3383feb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39, skipping insertion in model container [2022-03-17 19:21:39,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:21:39,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:21:39,360 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-03-17 19:21:39,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:21:39,397 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:21:39,407 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-03-17 19:21:39,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:21:39,435 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:21:39,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39 WrapperNode [2022-03-17 19:21:39,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:21:39,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:21:39,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:21:39,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:21:39,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:21:39,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:21:39,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:21:39,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:21:39,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:21:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:39,520 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) [2022-03-17 19:21:39,541 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 [2022-03-17 19:21:39,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:21:39,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:21:39,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:21:39,550 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 19:21:39,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:21:39,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:21:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:21:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 19:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:21:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:21:39,618 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:21:39,620 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:21:39,802 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:21:39,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:21:39,805 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-17 19:21:39,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:21:39 BoogieIcfgContainer [2022-03-17 19:21:39,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:21:39,810 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:21:39,810 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:21:39,811 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:21:39,813 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:21:39 BasicIcfg [2022-03-17 19:21:39,834 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:21:39,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:21:39,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:21:39,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:21:39,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:21:39" (1/4) ... [2022-03-17 19:21:39,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e653f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:21:39, skipping insertion in model container [2022-03-17 19:21:39,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (2/4) ... [2022-03-17 19:21:39,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e653f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:21:39, skipping insertion in model container [2022-03-17 19:21:39,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:21:39" (3/4) ... [2022-03-17 19:21:39,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e653f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:21:39, skipping insertion in model container [2022-03-17 19:21:39,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:21:39" (4/4) ... [2022-03-17 19:21:39,839 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.iqvasr [2022-03-17 19:21:39,853 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:21:39,853 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:21:39,899 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:21:39,907 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 [2022-03-17 19:21:39,908 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:21:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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) [2022-03-17 19:21:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 19:21:39,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:39,927 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:39,928 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1282627864, now seen corresponding path program 1 times [2022-03-17 19:21:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:39,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123929138] [2022-03-17 19:21:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:39,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:40,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:40,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123929138] [2022-03-17 19:21:40,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123929138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:40,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:21:40,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 19:21:40,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105602484] [2022-03-17 19:21:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:40,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:21:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:40,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:21:40,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:21:40,163 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-03-17 19:21:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:40,205 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-03-17 19:21:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:21:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 18 [2022-03-17 19:21:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:40,213 INFO L225 Difference]: With dead ends: 66 [2022-03-17 19:21:40,213 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 19:21:40,216 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 [2022-03-17 19:21:40,219 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 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 [2022-03-17 19:21:40,219 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 19:21:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 19:21:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2022-03-17 19:21:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-17 19:21:40,248 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-03-17 19:21:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:40,249 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-17 19:21:40,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-03-17 19:21:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-17 19:21:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 19:21:40,250 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:40,250 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:40,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:21:40,250 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 114426631, now seen corresponding path program 1 times [2022-03-17 19:21:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662074040] [2022-03-17 19:21:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662074040] [2022-03-17 19:21:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662074040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:40,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:21:40,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:21:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904074009] [2022-03-17 19:21:40,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:40,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:21:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:21:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:21:40,353 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-03-17 19:21:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:40,440 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-03-17 19:21:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:21:40,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2022-03-17 19:21:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:40,442 INFO L225 Difference]: With dead ends: 67 [2022-03-17 19:21:40,442 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 19:21:40,443 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:21:40,444 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:40,444 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:21:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 19:21:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-03-17 19:21:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2022-03-17 19:21:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-03-17 19:21:40,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-03-17 19:21:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:40,449 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-03-17 19:21:40,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-03-17 19:21:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-03-17 19:21:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 19:21:40,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:40,450 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:40,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:21:40,450 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:40,450 INFO L85 PathProgramCache]: Analyzing trace with hash -732347127, now seen corresponding path program 1 times [2022-03-17 19:21:40,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:40,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718943105] [2022-03-17 19:21:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:40,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:40,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:40,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718943105] [2022-03-17 19:21:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718943105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45353954] [2022-03-17 19:21:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:40,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:40,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:40,589 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) [2022-03-17 19:21:40,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:21:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 19:21:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 19:21:40,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:21:40,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45353954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:40,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:21:40,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-17 19:21:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808759884] [2022-03-17 19:21:40,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:40,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 19:21:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 19:21:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 19:21:40,767 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:40,793 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-03-17 19:21:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:21:40,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-17 19:21:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:40,794 INFO L225 Difference]: With dead ends: 55 [2022-03-17 19:21:40,794 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 19:21:40,794 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 19:21:40,795 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:40,796 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 154 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 19:21:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-03-17 19:21:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 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) [2022-03-17 19:21:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-03-17 19:21:40,802 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-03-17 19:21:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:40,802 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-03-17 19:21:40,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-03-17 19:21:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 19:21:40,803 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:40,803 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:40,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:41,022 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 [2022-03-17 19:21:41,023 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:41,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:41,023 INFO L85 PathProgramCache]: Analyzing trace with hash 797221654, now seen corresponding path program 1 times [2022-03-17 19:21:41,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:41,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305974776] [2022-03-17 19:21:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:41,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:21:41,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305974776] [2022-03-17 19:21:41,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305974776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964686073] [2022-03-17 19:21:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:41,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:41,144 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) [2022-03-17 19:21:41,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:21:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 19:21:41,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:21:41,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:21:41,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964686073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:41,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:21:41,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-17 19:21:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480660282] [2022-03-17 19:21:41,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:41,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:21:41,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:21:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 19:21:41,275 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:41,306 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2022-03-17 19:21:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:21:41,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-17 19:21:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:41,307 INFO L225 Difference]: With dead ends: 100 [2022-03-17 19:21:41,307 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 19:21:41,323 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 19:21:41,324 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:41,325 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 19:21:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2022-03-17 19:21:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 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) [2022-03-17 19:21:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-03-17 19:21:41,330 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 28 [2022-03-17 19:21:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:41,331 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-03-17 19:21:41,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-03-17 19:21:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 19:21:41,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:41,332 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:41,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:41,548 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 [2022-03-17 19:21:41,548 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:41,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1389931833, now seen corresponding path program 1 times [2022-03-17 19:21:41,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:41,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251565654] [2022-03-17 19:21:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 19:21:41,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:41,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251565654] [2022-03-17 19:21:41,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251565654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:41,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223162414] [2022-03-17 19:21:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:41,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:41,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:41,618 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) [2022-03-17 19:21:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:21:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 19:21:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:41,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-17 19:21:41,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-17 19:21:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 19:21:41,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:21:41,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223162414] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:41,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 19:21:41,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-03-17 19:21:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351365788] [2022-03-17 19:21:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:41,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 19:21:41,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 19:21:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-17 19:21:41,941 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:42,011 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-03-17 19:21:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 19:21:42,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 19:21:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:42,012 INFO L225 Difference]: With dead ends: 67 [2022-03-17 19:21:42,012 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 19:21:42,013 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-17 19:21:42,013 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:42,013 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 19:21:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-17 19:21:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 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) [2022-03-17 19:21:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-03-17 19:21:42,018 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2022-03-17 19:21:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:42,018 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-03-17 19:21:42,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-03-17 19:21:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 19:21:42,019 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:42,019 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:42,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:42,237 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 [2022-03-17 19:21:42,238 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1280910829, now seen corresponding path program 1 times [2022-03-17 19:21:42,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:42,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531656798] [2022-03-17 19:21:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:42,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:42,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 19:21:42,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:42,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531656798] [2022-03-17 19:21:42,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531656798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:42,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520779775] [2022-03-17 19:21:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:42,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:42,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:42,294 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) [2022-03-17 19:21:42,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 19:21:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 19:21:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:42,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-17 19:21:42,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-17 19:21:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:21:42,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 19:21:42,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520779775] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:42,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 19:21:42,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-03-17 19:21:42,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611883058] [2022-03-17 19:21:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:42,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 19:21:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 19:21:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-17 19:21:42,583 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:42,659 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-03-17 19:21:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 19:21:42,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-17 19:21:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:42,660 INFO L225 Difference]: With dead ends: 72 [2022-03-17 19:21:42,660 INFO L226 Difference]: Without dead ends: 67 [2022-03-17 19:21:42,660 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-17 19:21:42,661 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:42,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 94 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:42,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-17 19:21:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2022-03-17 19:21:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 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) [2022-03-17 19:21:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-17 19:21:42,666 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 30 [2022-03-17 19:21:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:42,667 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-17 19:21:42,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-17 19:21:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 19:21:42,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:42,668 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:42,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:42,885 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 [2022-03-17 19:21:42,886 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:42,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1387529366, now seen corresponding path program 1 times [2022-03-17 19:21:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:42,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396889500] [2022-03-17 19:21:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:21:42,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:42,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396889500] [2022-03-17 19:21:42,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396889500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:42,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671501354] [2022-03-17 19:21:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:42,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:42,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:42,942 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) [2022-03-17 19:21:42,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 19:21:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:43,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 19:21:43,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:21:43,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 19:21:43,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671501354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:43,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:43,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2022-03-17 19:21:43,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163816286] [2022-03-17 19:21:43,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:43,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 19:21:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 19:21:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-17 19:21:43,111 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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) [2022-03-17 19:21:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:43,432 INFO L93 Difference]: Finished difference Result 211 states and 285 transitions. [2022-03-17 19:21:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 19:21:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-17 19:21:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:43,433 INFO L225 Difference]: With dead ends: 211 [2022-03-17 19:21:43,434 INFO L226 Difference]: Without dead ends: 173 [2022-03-17 19:21:43,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:21:43,435 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 288 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:43,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 70 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:21:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-17 19:21:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 53. [2022-03-17 19:21:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 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) [2022-03-17 19:21:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2022-03-17 19:21:43,442 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 31 [2022-03-17 19:21:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:43,442 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2022-03-17 19:21:43,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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) [2022-03-17 19:21:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2022-03-17 19:21:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 19:21:43,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:43,443 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:43,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:43,662 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 [2022-03-17 19:21:43,662 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash -830957429, now seen corresponding path program 2 times [2022-03-17 19:21:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:43,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892883860] [2022-03-17 19:21:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:43,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 19:21:43,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892883860] [2022-03-17 19:21:43,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892883860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094643255] [2022-03-17 19:21:43,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:21:43,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:43,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:43,760 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) [2022-03-17 19:21:43,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 19:21:43,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:21:43,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:21:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 19:21:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:43,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-17 19:21:44,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-17 19:21:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 19:21:44,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:21:44,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094643255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:44,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:44,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 9] total 22 [2022-03-17 19:21:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071947773] [2022-03-17 19:21:44,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:44,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 19:21:44,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 19:21:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:21:44,178 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 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) [2022-03-17 19:21:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:44,771 INFO L93 Difference]: Finished difference Result 230 states and 312 transitions. [2022-03-17 19:21:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 19:21:44,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 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 35 [2022-03-17 19:21:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:44,773 INFO L225 Difference]: With dead ends: 230 [2022-03-17 19:21:44,773 INFO L226 Difference]: Without dead ends: 188 [2022-03-17 19:21:44,773 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 19:21:44,774 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 527 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:44,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 105 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 19:21:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-17 19:21:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 78. [2022-03-17 19:21:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 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) [2022-03-17 19:21:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-03-17 19:21:44,794 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 35 [2022-03-17 19:21:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:44,794 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-03-17 19:21:44,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 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) [2022-03-17 19:21:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-03-17 19:21:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 19:21:44,795 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:44,795 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:44,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-17 19:21:45,016 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 [2022-03-17 19:21:45,016 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:45,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:45,017 INFO L85 PathProgramCache]: Analyzing trace with hash 398344247, now seen corresponding path program 1 times [2022-03-17 19:21:45,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:45,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999456046] [2022-03-17 19:21:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:45,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 19:21:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999456046] [2022-03-17 19:21:45,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999456046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273333100] [2022-03-17 19:21:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:45,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:45,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:45,100 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) [2022-03-17 19:21:45,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 19:21:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 19:21:45,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-17 19:21:45,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:21:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273333100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:45,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:21:45,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-03-17 19:21:45,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548373423] [2022-03-17 19:21:45,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:45,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:21:45,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:21:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 19:21:45,202 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:45,224 INFO L93 Difference]: Finished difference Result 145 states and 194 transitions. [2022-03-17 19:21:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:21:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-17 19:21:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:45,225 INFO L225 Difference]: With dead ends: 145 [2022-03-17 19:21:45,225 INFO L226 Difference]: Without dead ends: 100 [2022-03-17 19:21:45,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 19:21:45,227 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:45,228 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-17 19:21:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2022-03-17 19:21:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 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) [2022-03-17 19:21:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2022-03-17 19:21:45,250 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 38 [2022-03-17 19:21:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:45,251 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2022-03-17 19:21:45,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2022-03-17 19:21:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 19:21:45,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:45,254 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:45,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:45,471 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 [2022-03-17 19:21:45,472 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1770900345, now seen corresponding path program 1 times [2022-03-17 19:21:45,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:45,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720623283] [2022-03-17 19:21:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:45,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 19:21:45,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:45,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720623283] [2022-03-17 19:21:45,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720623283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:45,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417394937] [2022-03-17 19:21:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:45,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:45,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:45,537 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) [2022-03-17 19:21:45,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 19:21:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 19:21:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 19:21:45,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-17 19:21:45,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417394937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:45,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:45,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 17 [2022-03-17 19:21:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121198255] [2022-03-17 19:21:45,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:45,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 19:21:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 19:21:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-17 19:21:45,801 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:46,881 INFO L93 Difference]: Finished difference Result 486 states and 650 transitions. [2022-03-17 19:21:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-17 19:21:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-17 19:21:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:46,884 INFO L225 Difference]: With dead ends: 486 [2022-03-17 19:21:46,884 INFO L226 Difference]: Without dead ends: 408 [2022-03-17 19:21:46,888 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1891, Unknown=0, NotChecked=0, Total=2256 [2022-03-17 19:21:46,889 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 686 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:46,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 170 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 19:21:46,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-03-17 19:21:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 116. [2022-03-17 19:21:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.2882882882882882) internal successors, (143), 111 states have internal predecessors, (143), 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) [2022-03-17 19:21:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2022-03-17 19:21:46,912 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 41 [2022-03-17 19:21:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:46,912 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2022-03-17 19:21:46,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2022-03-17 19:21:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 19:21:46,915 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:46,915 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:46,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-17 19:21:47,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 19:21:47,132 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1579634730, now seen corresponding path program 1 times [2022-03-17 19:21:47,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:47,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926150597] [2022-03-17 19:21:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:47,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:47,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 19:21:47,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:47,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926150597] [2022-03-17 19:21:47,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926150597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:47,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339933234] [2022-03-17 19:21:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:47,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:47,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:47,206 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:47,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 19:21:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-17 19:21:47,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:47,518 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 19:21:47,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-17 19:21:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 19:21:47,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:47,660 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-03-17 19:21:47,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 65 [2022-03-17 19:21:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 19:21:47,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339933234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:47,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:47,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2022-03-17 19:21:47,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908086619] [2022-03-17 19:21:47,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:47,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 19:21:47,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 19:21:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:21:47,800 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 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) [2022-03-17 19:21:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:48,870 INFO L93 Difference]: Finished difference Result 648 states and 874 transitions. [2022-03-17 19:21:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 19:21:48,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-17 19:21:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:48,873 INFO L225 Difference]: With dead ends: 648 [2022-03-17 19:21:48,873 INFO L226 Difference]: Without dead ends: 547 [2022-03-17 19:21:48,875 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 19:21:48,875 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 583 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:48,876 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 148 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 19:21:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-03-17 19:21:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 164. [2022-03-17 19:21:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 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) [2022-03-17 19:21:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2022-03-17 19:21:48,903 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 43 [2022-03-17 19:21:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:48,903 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2022-03-17 19:21:48,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 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) [2022-03-17 19:21:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2022-03-17 19:21:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 19:21:48,905 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:48,905 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:48,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:49,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:49,124 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash -995410890, now seen corresponding path program 1 times [2022-03-17 19:21:49,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894087557] [2022-03-17 19:21:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:49,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:49,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 19:21:49,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894087557] [2022-03-17 19:21:49,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894087557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844383136] [2022-03-17 19:21:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:49,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:49,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:49,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:49,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 19:21:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 19:21:49,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:49,463 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-17 19:21:49,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-17 19:21:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-17 19:21:49,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:49,633 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-17 19:21:49,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-17 19:21:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-17 19:21:49,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844383136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:49,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:49,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 9] total 19 [2022-03-17 19:21:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68365722] [2022-03-17 19:21:49,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:49,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 19:21:49,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 19:21:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-17 19:21:49,719 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 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) [2022-03-17 19:21:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:50,162 INFO L93 Difference]: Finished difference Result 461 states and 627 transitions. [2022-03-17 19:21:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 19:21:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 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 45 [2022-03-17 19:21:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:50,164 INFO L225 Difference]: With dead ends: 461 [2022-03-17 19:21:50,164 INFO L226 Difference]: Without dead ends: 358 [2022-03-17 19:21:50,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-03-17 19:21:50,165 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 246 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:50,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 87 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:21:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-17 19:21:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 218. [2022-03-17 19:21:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.2535211267605635) internal successors, (267), 213 states have internal predecessors, (267), 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) [2022-03-17 19:21:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 271 transitions. [2022-03-17 19:21:50,207 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 271 transitions. Word has length 45 [2022-03-17 19:21:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:50,208 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 271 transitions. [2022-03-17 19:21:50,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 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) [2022-03-17 19:21:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 271 transitions. [2022-03-17 19:21:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 19:21:50,208 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:50,208 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:50,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:50,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 19:21:50,425 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash -115243393, now seen corresponding path program 2 times [2022-03-17 19:21:50,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:50,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665944243] [2022-03-17 19:21:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:50,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:50,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-17 19:21:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665944243] [2022-03-17 19:21:50,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665944243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896105902] [2022-03-17 19:21:50,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:21:50,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:50,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:50,589 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:50,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 19:21:50,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:21:50,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:21:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 19:21:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-17 19:21:50,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-17 19:21:51,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896105902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:51,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:51,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-03-17 19:21:51,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273059122] [2022-03-17 19:21:51,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:51,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 19:21:51,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 19:21:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-17 19:21:51,128 INFO L87 Difference]: Start difference. First operand 218 states and 271 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:52,654 INFO L93 Difference]: Finished difference Result 656 states and 861 transitions. [2022-03-17 19:21:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-17 19:21:52,654 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-17 19:21:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:52,658 INFO L225 Difference]: With dead ends: 656 [2022-03-17 19:21:52,658 INFO L226 Difference]: Without dead ends: 650 [2022-03-17 19:21:52,659 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=2519, Unknown=0, NotChecked=0, Total=2862 [2022-03-17 19:21:52,660 INFO L912 BasicCegarLoop]: 111 mSDtfsCounter, 613 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:52,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 178 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 19:21:52,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-17 19:21:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 284. [2022-03-17 19:21:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.2580645161290323) internal successors, (351), 279 states have internal predecessors, (351), 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) [2022-03-17 19:21:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 355 transitions. [2022-03-17 19:21:52,701 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 355 transitions. Word has length 51 [2022-03-17 19:21:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:52,702 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 355 transitions. [2022-03-17 19:21:52,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 355 transitions. [2022-03-17 19:21:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 19:21:52,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:52,703 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:52,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:52,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 19:21:52,921 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash -311756898, now seen corresponding path program 1 times [2022-03-17 19:21:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:52,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655633325] [2022-03-17 19:21:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:53,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 19:21:53,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:53,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655633325] [2022-03-17 19:21:53,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655633325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:53,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778724763] [2022-03-17 19:21:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:53,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:53,273 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:53,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 19:21:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:53,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-17 19:21:53,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:53,723 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:21:53,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-17 19:21:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 19:21:53,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:56,162 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-03-17 19:21:56,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-03-17 19:21:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-17 19:21:56,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778724763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:56,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:56,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 30 [2022-03-17 19:21:56,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663490177] [2022-03-17 19:21:56,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:56,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-17 19:21:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:56,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-17 19:21:56,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=751, Unknown=4, NotChecked=0, Total=870 [2022-03-17 19:21:56,323 INFO L87 Difference]: Start difference. First operand 284 states and 355 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 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) [2022-03-17 19:21:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:57,958 INFO L93 Difference]: Finished difference Result 736 states and 958 transitions. [2022-03-17 19:21:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-17 19:21:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 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 51 [2022-03-17 19:21:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:57,961 INFO L225 Difference]: With dead ends: 736 [2022-03-17 19:21:57,961 INFO L226 Difference]: Without dead ends: 544 [2022-03-17 19:21:57,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=518, Invalid=2670, Unknown=4, NotChecked=0, Total=3192 [2022-03-17 19:21:57,962 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 253 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:57,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 114 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1125 Invalid, 0 Unknown, 167 Unchecked, 0.6s Time] [2022-03-17 19:21:57,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-03-17 19:21:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 388. [2022-03-17 19:21:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.2349869451697129) internal successors, (473), 383 states have internal predecessors, (473), 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) [2022-03-17 19:21:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 477 transitions. [2022-03-17 19:21:58,027 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 477 transitions. Word has length 51 [2022-03-17 19:21:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:58,028 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 477 transitions. [2022-03-17 19:21:58,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 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) [2022-03-17 19:21:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 477 transitions. [2022-03-17 19:21:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 19:21:58,042 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:58,042 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:58,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:58,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 19:21:58,260 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2141667614, now seen corresponding path program 1 times [2022-03-17 19:21:58,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:58,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039655174] [2022-03-17 19:21:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:58,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:58,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 19:21:58,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:58,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039655174] [2022-03-17 19:21:58,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039655174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:58,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674523604] [2022-03-17 19:21:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:58,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:58,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:58,519 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:58,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 19:21:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-17 19:21:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:58,966 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:21:58,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-17 19:21:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 19:21:58,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:01,343 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-17 19:22:01,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-17 19:22:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-17 19:22:01,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674523604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:01,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:01,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 29 [2022-03-17 19:22:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251503304] [2022-03-17 19:22:01,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:01,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-17 19:22:01,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-17 19:22:01,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=692, Unknown=4, NotChecked=0, Total=812 [2022-03-17 19:22:01,453 INFO L87 Difference]: Start difference. First operand 388 states and 477 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 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) [2022-03-17 19:22:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:02,891 INFO L93 Difference]: Finished difference Result 584 states and 748 transitions. [2022-03-17 19:22:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-17 19:22:02,891 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 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 51 [2022-03-17 19:22:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:02,893 INFO L225 Difference]: With dead ends: 584 [2022-03-17 19:22:02,893 INFO L226 Difference]: Without dead ends: 550 [2022-03-17 19:22:02,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=714, Invalid=3064, Unknown=4, NotChecked=0, Total=3782 [2022-03-17 19:22:02,894 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 175 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:02,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 88 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 592 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-03-17 19:22:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-17 19:22:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 432. [2022-03-17 19:22:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 427 states have (on average 1.224824355971897) internal successors, (523), 427 states have internal predecessors, (523), 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) [2022-03-17 19:22:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 527 transitions. [2022-03-17 19:22:02,973 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 527 transitions. Word has length 51 [2022-03-17 19:22:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:02,974 INFO L478 AbstractCegarLoop]: Abstraction has 432 states and 527 transitions. [2022-03-17 19:22:02,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 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) [2022-03-17 19:22:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 527 transitions. [2022-03-17 19:22:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 19:22:02,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:02,975 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:02,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:03,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-17 19:22:03,193 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:03,193 INFO L85 PathProgramCache]: Analyzing trace with hash -228944736, now seen corresponding path program 1 times [2022-03-17 19:22:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:03,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155354995] [2022-03-17 19:22:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:03,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:03,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 19:22:03,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155354995] [2022-03-17 19:22:03,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155354995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554906695] [2022-03-17 19:22:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:03,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:03,683 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:03,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 19:22:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:03,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-17 19:22:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:04,024 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:22:04,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-17 19:22:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 19:22:04,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:04,191 INFO L356 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-03-17 19:22:04,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 75 [2022-03-17 19:22:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-17 19:22:04,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554906695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:04,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:04,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 31 [2022-03-17 19:22:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247684771] [2022-03-17 19:22:04,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:04,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 19:22:04,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 19:22:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-03-17 19:22:04,342 INFO L87 Difference]: Start difference. First operand 432 states and 527 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 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) [2022-03-17 19:22:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:05,862 INFO L93 Difference]: Finished difference Result 738 states and 931 transitions. [2022-03-17 19:22:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-17 19:22:05,863 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 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 51 [2022-03-17 19:22:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:05,865 INFO L225 Difference]: With dead ends: 738 [2022-03-17 19:22:05,865 INFO L226 Difference]: Without dead ends: 682 [2022-03-17 19:22:05,866 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=805, Invalid=2977, Unknown=0, NotChecked=0, Total=3782 [2022-03-17 19:22:05,866 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 356 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:05,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 85 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 19:22:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-17 19:22:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 437. [2022-03-17 19:22:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 432 states have (on average 1.2291666666666667) internal successors, (531), 432 states have internal predecessors, (531), 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) [2022-03-17 19:22:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 535 transitions. [2022-03-17 19:22:05,946 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 535 transitions. Word has length 51 [2022-03-17 19:22:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:05,946 INFO L478 AbstractCegarLoop]: Abstraction has 437 states and 535 transitions. [2022-03-17 19:22:05,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 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) [2022-03-17 19:22:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 535 transitions. [2022-03-17 19:22:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 19:22:05,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:05,947 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:05,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:06,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:06,162 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -316045411, now seen corresponding path program 1 times [2022-03-17 19:22:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:06,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830828005] [2022-03-17 19:22:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:06,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-17 19:22:06,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:06,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830828005] [2022-03-17 19:22:06,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830828005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:06,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883026401] [2022-03-17 19:22:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:06,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:06,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:06,250 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:06,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 19:22:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:06,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 19:22:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 19:22:06,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-17 19:22:06,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883026401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:06,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:06,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 10] total 19 [2022-03-17 19:22:06,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144612564] [2022-03-17 19:22:06,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:06,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 19:22:06,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:06,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 19:22:06,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-17 19:22:06,643 INFO L87 Difference]: Start difference. First operand 437 states and 535 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 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) [2022-03-17 19:22:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:10,744 INFO L93 Difference]: Finished difference Result 2985 states and 3809 transitions. [2022-03-17 19:22:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-17 19:22:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 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 54 [2022-03-17 19:22:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:10,751 INFO L225 Difference]: With dead ends: 2985 [2022-03-17 19:22:10,751 INFO L226 Difference]: Without dead ends: 2833 [2022-03-17 19:22:10,755 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7899 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2674, Invalid=17348, Unknown=0, NotChecked=0, Total=20022 [2022-03-17 19:22:10,757 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 1805 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:10,757 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1805 Valid, 110 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-17 19:22:10,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2022-03-17 19:22:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 500. [2022-03-17 19:22:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 495 states have (on average 1.2444444444444445) internal successors, (616), 495 states have internal predecessors, (616), 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) [2022-03-17 19:22:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 620 transitions. [2022-03-17 19:22:10,891 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 620 transitions. Word has length 54 [2022-03-17 19:22:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:10,891 INFO L478 AbstractCegarLoop]: Abstraction has 500 states and 620 transitions. [2022-03-17 19:22:10,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 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) [2022-03-17 19:22:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 620 transitions. [2022-03-17 19:22:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-17 19:22:10,892 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:10,892 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:10,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:11,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 19:22:11,096 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash -90443586, now seen corresponding path program 1 times [2022-03-17 19:22:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:11,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391262286] [2022-03-17 19:22:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:11,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 19:22:11,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:11,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391262286] [2022-03-17 19:22:11,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391262286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:11,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424980865] [2022-03-17 19:22:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:11,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:11,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:11,151 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:11,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 19:22:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:11,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 19:22:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 19:22:11,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 19:22:11,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424980865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:11,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:11,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2022-03-17 19:22:11,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336146997] [2022-03-17 19:22:11,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:11,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 19:22:11,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 19:22:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 19:22:11,452 INFO L87 Difference]: Start difference. First operand 500 states and 620 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 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) [2022-03-17 19:22:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:11,825 INFO L93 Difference]: Finished difference Result 877 states and 1083 transitions. [2022-03-17 19:22:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 19:22:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 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 57 [2022-03-17 19:22:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:11,828 INFO L225 Difference]: With dead ends: 877 [2022-03-17 19:22:11,828 INFO L226 Difference]: Without dead ends: 470 [2022-03-17 19:22:11,828 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-03-17 19:22:11,829 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 194 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:11,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 75 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:22:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-17 19:22:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 343. [2022-03-17 19:22:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.168639053254438) internal successors, (395), 338 states have internal predecessors, (395), 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) [2022-03-17 19:22:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 399 transitions. [2022-03-17 19:22:11,912 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 399 transitions. Word has length 57 [2022-03-17 19:22:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:11,912 INFO L478 AbstractCegarLoop]: Abstraction has 343 states and 399 transitions. [2022-03-17 19:22:11,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 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) [2022-03-17 19:22:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 399 transitions. [2022-03-17 19:22:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 19:22:11,912 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:11,913 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:11,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:12,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 19:22:12,145 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1290898950, now seen corresponding path program 2 times [2022-03-17 19:22:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:12,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047522096] [2022-03-17 19:22:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:12,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:12,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 19:22:12,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:12,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047522096] [2022-03-17 19:22:12,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047522096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:12,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152094463] [2022-03-17 19:22:12,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:22:12,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:12,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:12,457 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:12,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 19:22:12,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:22:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:12,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-17 19:22:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:13,152 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 19:22:13,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2022-03-17 19:22:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 19:22:13,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:13,565 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-17 19:22:13,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 37 [2022-03-17 19:22:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-17 19:22:13,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152094463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:13,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:13,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 16] total 43 [2022-03-17 19:22:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687084718] [2022-03-17 19:22:13,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:13,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-17 19:22:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-17 19:22:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-03-17 19:22:13,649 INFO L87 Difference]: Start difference. First operand 343 states and 399 transitions. Second operand has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 42 states have internal predecessors, (112), 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) [2022-03-17 19:22:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:15,004 INFO L93 Difference]: Finished difference Result 455 states and 520 transitions. [2022-03-17 19:22:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-17 19:22:15,004 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 42 states have internal predecessors, (112), 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 61 [2022-03-17 19:22:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:15,006 INFO L225 Difference]: With dead ends: 455 [2022-03-17 19:22:15,006 INFO L226 Difference]: Without dead ends: 371 [2022-03-17 19:22:15,007 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=742, Invalid=3548, Unknown=0, NotChecked=0, Total=4290 [2022-03-17 19:22:15,007 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 447 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:15,007 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 125 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 981 Invalid, 0 Unknown, 246 Unchecked, 0.4s Time] [2022-03-17 19:22:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-17 19:22:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 321. [2022-03-17 19:22:15,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 316 states have (on average 1.1708860759493671) internal successors, (370), 316 states have internal predecessors, (370), 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) [2022-03-17 19:22:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 374 transitions. [2022-03-17 19:22:15,075 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 374 transitions. Word has length 61 [2022-03-17 19:22:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:15,075 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 374 transitions. [2022-03-17 19:22:15,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 42 states have internal predecessors, (112), 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) [2022-03-17 19:22:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 374 transitions. [2022-03-17 19:22:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-17 19:22:15,076 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:15,076 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:15,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:15,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:15,292 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1745771759, now seen corresponding path program 2 times [2022-03-17 19:22:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:15,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625688701] [2022-03-17 19:22:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:15,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:15,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-17 19:22:15,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:15,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625688701] [2022-03-17 19:22:15,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625688701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:15,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022653392] [2022-03-17 19:22:15,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:22:15,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:15,420 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:15,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 19:22:15,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:22:15,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-17 19:22:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:15,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-17 19:22:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-17 19:22:15,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:15,975 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-17 19:22:15,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-03-17 19:22:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-17 19:22:16,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022653392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:16,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:16,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 31 [2022-03-17 19:22:16,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126201703] [2022-03-17 19:22:16,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:16,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 19:22:16,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:16,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 19:22:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-03-17 19:22:16,054 INFO L87 Difference]: Start difference. First operand 321 states and 374 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 30 states have internal predecessors, (108), 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) [2022-03-17 19:22:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:18,891 INFO L93 Difference]: Finished difference Result 3028 states and 3554 transitions. [2022-03-17 19:22:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-17 19:22:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 30 states have internal predecessors, (108), 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 62 [2022-03-17 19:22:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:18,897 INFO L225 Difference]: With dead ends: 3028 [2022-03-17 19:22:18,898 INFO L226 Difference]: Without dead ends: 2927 [2022-03-17 19:22:18,899 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=594, Invalid=4236, Unknown=0, NotChecked=0, Total=4830 [2022-03-17 19:22:18,899 INFO L912 BasicCegarLoop]: 176 mSDtfsCounter, 1409 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4814 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 5018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 4814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:18,899 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 253 Invalid, 5018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 4814 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-17 19:22:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-03-17 19:22:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 615. [2022-03-17 19:22:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 610 states have (on average 1.1655737704918032) internal successors, (711), 610 states have internal predecessors, (711), 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) [2022-03-17 19:22:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 715 transitions. [2022-03-17 19:22:19,070 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 715 transitions. Word has length 62 [2022-03-17 19:22:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:19,071 INFO L478 AbstractCegarLoop]: Abstraction has 615 states and 715 transitions. [2022-03-17 19:22:19,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 30 states have internal predecessors, (108), 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) [2022-03-17 19:22:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 715 transitions. [2022-03-17 19:22:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 19:22:19,072 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:19,072 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:19,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:19,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:19,283 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash 680057758, now seen corresponding path program 3 times [2022-03-17 19:22:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400869256] [2022-03-17 19:22:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:19,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:19,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-17 19:22:19,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:19,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400869256] [2022-03-17 19:22:19,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400869256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:19,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157454475] [2022-03-17 19:22:19,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:22:19,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:19,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:19,839 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:19,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 19:22:20,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-17 19:22:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-17 19:22:20,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:20,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:22:20,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-17 19:22:20,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:22:20,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:22:20,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 19:22:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 19:22:20,526 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:22:20,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-03-17 19:22:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 58 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-17 19:22:20,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 19:22:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157454475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:27,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:27,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 12] total 38 [2022-03-17 19:22:27,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891303132] [2022-03-17 19:22:27,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:27,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-17 19:22:27,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:27,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-17 19:22:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1186, Unknown=12, NotChecked=0, Total=1406 [2022-03-17 19:22:27,164 INFO L87 Difference]: Start difference. First operand 615 states and 715 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 37 states have internal predecessors, (125), 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) [2022-03-17 19:22:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:28,804 INFO L93 Difference]: Finished difference Result 1273 states and 1473 transitions. [2022-03-17 19:22:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-17 19:22:28,804 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 37 states have internal predecessors, (125), 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 72 [2022-03-17 19:22:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:28,807 INFO L225 Difference]: With dead ends: 1273 [2022-03-17 19:22:28,807 INFO L226 Difference]: Without dead ends: 1195 [2022-03-17 19:22:28,808 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=613, Invalid=3665, Unknown=12, NotChecked=0, Total=4290 [2022-03-17 19:22:28,808 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 298 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:28,809 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 127 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1443 Invalid, 0 Unknown, 315 Unchecked, 0.7s Time] [2022-03-17 19:22:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-03-17 19:22:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 921. [2022-03-17 19:22:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 916 states have (on average 1.165938864628821) internal successors, (1068), 916 states have internal predecessors, (1068), 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) [2022-03-17 19:22:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1072 transitions. [2022-03-17 19:22:29,055 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1072 transitions. Word has length 72 [2022-03-17 19:22:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:29,055 INFO L478 AbstractCegarLoop]: Abstraction has 921 states and 1072 transitions. [2022-03-17 19:22:29,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 37 states have internal predecessors, (125), 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) [2022-03-17 19:22:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1072 transitions. [2022-03-17 19:22:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 19:22:29,056 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:29,057 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:29,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:29,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:29,277 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:29,277 INFO L85 PathProgramCache]: Analyzing trace with hash 120675200, now seen corresponding path program 4 times [2022-03-17 19:22:29,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:29,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294596600] [2022-03-17 19:22:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:29,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:29,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-17 19:22:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294596600] [2022-03-17 19:22:29,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294596600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313505004] [2022-03-17 19:22:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:22:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:29,990 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:29,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 19:22:30,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:22:30,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:30,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 19:22:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:30,626 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 19:22:30,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-17 19:22:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 19:22:30,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:30,867 INFO L356 Elim1Store]: treesize reduction 35, result has 63.9 percent of original size [2022-03-17 19:22:30,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-03-17 19:22:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 19:22:31,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313505004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:31,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:31,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 13] total 39 [2022-03-17 19:22:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755976542] [2022-03-17 19:22:31,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:31,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-17 19:22:31,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-17 19:22:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-03-17 19:22:31,010 INFO L87 Difference]: Start difference. First operand 921 states and 1072 transitions. Second operand has 39 states, 39 states have (on average 3.41025641025641) internal successors, (133), 38 states have internal predecessors, (133), 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) [2022-03-17 19:22:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:33,978 INFO L93 Difference]: Finished difference Result 2108 states and 2443 transitions. [2022-03-17 19:22:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-17 19:22:33,978 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.41025641025641) internal successors, (133), 38 states have internal predecessors, (133), 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 72 [2022-03-17 19:22:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:33,982 INFO L225 Difference]: With dead ends: 2108 [2022-03-17 19:22:33,982 INFO L226 Difference]: Without dead ends: 1790 [2022-03-17 19:22:33,984 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1236, Invalid=7506, Unknown=0, NotChecked=0, Total=8742 [2022-03-17 19:22:33,984 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 457 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:33,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 102 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-17 19:22:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-03-17 19:22:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1278. [2022-03-17 19:22:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1273 states have (on average 1.171249018067557) internal successors, (1491), 1273 states have internal predecessors, (1491), 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) [2022-03-17 19:22:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1495 transitions. [2022-03-17 19:22:34,361 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1495 transitions. Word has length 72 [2022-03-17 19:22:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:34,361 INFO L478 AbstractCegarLoop]: Abstraction has 1278 states and 1495 transitions. [2022-03-17 19:22:34,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.41025641025641) internal successors, (133), 38 states have internal predecessors, (133), 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) [2022-03-17 19:22:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1495 transitions. [2022-03-17 19:22:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 19:22:34,364 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:34,364 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:34,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:34,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-17 19:22:34,585 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:34,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1596025634, now seen corresponding path program 5 times [2022-03-17 19:22:34,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:34,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346077138] [2022-03-17 19:22:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:34,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:35,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-17 19:22:35,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:35,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346077138] [2022-03-17 19:22:35,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346077138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:35,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976749956] [2022-03-17 19:22:35,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 19:22:35,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:35,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:35,122 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:35,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 19:22:35,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-17 19:22:35,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-17 19:22:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:35,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:22:35,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-17 19:22:36,445 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 19:22:36,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-17 19:22:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 62 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-17 19:22:36,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-17 19:22:41,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976749956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:41,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:41,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22, 18] total 46 [2022-03-17 19:22:41,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61800085] [2022-03-17 19:22:41,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:41,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-17 19:22:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-17 19:22:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1723, Unknown=3, NotChecked=0, Total=2070 [2022-03-17 19:22:41,336 INFO L87 Difference]: Start difference. First operand 1278 states and 1495 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 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) [2022-03-17 19:22:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:45,042 INFO L93 Difference]: Finished difference Result 2173 states and 2536 transitions. [2022-03-17 19:22:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-17 19:22:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 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 72 [2022-03-17 19:22:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:45,047 INFO L225 Difference]: With dead ends: 2173 [2022-03-17 19:22:45,047 INFO L226 Difference]: Without dead ends: 2134 [2022-03-17 19:22:45,048 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 154 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1749, Invalid=10238, Unknown=3, NotChecked=0, Total=11990 [2022-03-17 19:22:45,049 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 541 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1117 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:45,049 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 199 Invalid, 3620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2388 Invalid, 0 Unknown, 1117 Unchecked, 1.0s Time] [2022-03-17 19:22:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2022-03-17 19:22:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1389. [2022-03-17 19:22:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1384 states have (on average 1.1589595375722543) internal successors, (1604), 1384 states have internal predecessors, (1604), 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) [2022-03-17 19:22:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1608 transitions. [2022-03-17 19:22:45,493 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1608 transitions. Word has length 72 [2022-03-17 19:22:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:45,494 INFO L478 AbstractCegarLoop]: Abstraction has 1389 states and 1608 transitions. [2022-03-17 19:22:45,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 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) [2022-03-17 19:22:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1608 transitions. [2022-03-17 19:22:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 19:22:45,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:45,496 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:45,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:45,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-17 19:22:45,715 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1692915136, now seen corresponding path program 6 times [2022-03-17 19:22:45,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580229405] [2022-03-17 19:22:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:46,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 19:22:46,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580229405] [2022-03-17 19:22:46,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580229405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930868711] [2022-03-17 19:22:46,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 19:22:46,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:46,374 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:46,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-17 19:22:46,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-17 19:22:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:46,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-17 19:22:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:46,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:22:47,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 19:22:47,023 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-17 19:22:47,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 18 [2022-03-17 19:22:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-17 19:22:47,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 19:22:47,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930868711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:47,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:47,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 36 [2022-03-17 19:22:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062318578] [2022-03-17 19:22:47,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:47,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-17 19:22:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-17 19:22:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 19:22:47,429 INFO L87 Difference]: Start difference. First operand 1389 states and 1608 transitions. Second operand has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 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) [2022-03-17 19:22:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:48,732 INFO L93 Difference]: Finished difference Result 1766 states and 2024 transitions. [2022-03-17 19:22:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 19:22:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 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 72 [2022-03-17 19:22:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:48,737 INFO L225 Difference]: With dead ends: 1766 [2022-03-17 19:22:48,737 INFO L226 Difference]: Without dead ends: 1560 [2022-03-17 19:22:48,738 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=407, Invalid=2043, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 19:22:48,738 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 214 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:48,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 109 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 973 Invalid, 0 Unknown, 290 Unchecked, 0.4s Time] [2022-03-17 19:22:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-03-17 19:22:49,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1422. [2022-03-17 19:22:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1417 states have (on average 1.1496118560338744) internal successors, (1629), 1417 states have internal predecessors, (1629), 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) [2022-03-17 19:22:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1633 transitions. [2022-03-17 19:22:49,179 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1633 transitions. Word has length 72 [2022-03-17 19:22:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:49,180 INFO L478 AbstractCegarLoop]: Abstraction has 1422 states and 1633 transitions. [2022-03-17 19:22:49,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 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) [2022-03-17 19:22:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1633 transitions. [2022-03-17 19:22:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-17 19:22:49,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:49,182 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:49,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:49,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:49,399 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:49,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:49,399 INFO L85 PathProgramCache]: Analyzing trace with hash 844603479, now seen corresponding path program 3 times [2022-03-17 19:22:49,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:49,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655367600] [2022-03-17 19:22:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:49,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:49,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-17 19:22:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655367600] [2022-03-17 19:22:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655367600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851631355] [2022-03-17 19:22:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:22:49,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:49,510 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:49,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-17 19:22:49,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 19:22:49,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:49,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 19:22:49,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:49,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 19:22:49,765 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:22:49,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-03-17 19:22:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-17 19:22:49,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:22:49,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851631355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:22:49,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:22:49,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-03-17 19:22:49,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893434298] [2022-03-17 19:22:49,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:22:49,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 19:22:49,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 19:22:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-03-17 19:22:49,811 INFO L87 Difference]: Start difference. First operand 1422 states and 1633 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:50,299 INFO L93 Difference]: Finished difference Result 1468 states and 1685 transitions. [2022-03-17 19:22:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 19:22:50,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-17 19:22:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:50,302 INFO L225 Difference]: With dead ends: 1468 [2022-03-17 19:22:50,302 INFO L226 Difference]: Without dead ends: 1401 [2022-03-17 19:22:50,303 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-03-17 19:22:50,306 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:50,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 92 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-03-17 19:22:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-03-17 19:22:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1401. [2022-03-17 19:22:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1396 states have (on average 1.1482808022922637) internal successors, (1603), 1396 states have internal predecessors, (1603), 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) [2022-03-17 19:22:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1607 transitions. [2022-03-17 19:22:50,805 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1607 transitions. Word has length 74 [2022-03-17 19:22:50,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:50,805 INFO L478 AbstractCegarLoop]: Abstraction has 1401 states and 1607 transitions. [2022-03-17 19:22:50,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1607 transitions. [2022-03-17 19:22:50,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-17 19:22:50,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:50,808 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:50,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-17 19:22:51,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:51,024 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1217461719, now seen corresponding path program 7 times [2022-03-17 19:22:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830183098] [2022-03-17 19:22:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:51,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-17 19:22:51,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:51,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830183098] [2022-03-17 19:22:51,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830183098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:51,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238415099] [2022-03-17 19:22:51,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 19:22:51,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:51,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:51,151 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:51,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-17 19:22:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-17 19:22:51,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:52,209 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 19:22:52,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-17 19:22:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 19:22:52,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:54,615 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-17 19:22:54,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2022-03-17 19:22:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-17 19:22:54,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238415099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:54,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:54,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 18] total 44 [2022-03-17 19:22:54,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007879958] [2022-03-17 19:22:54,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:54,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-17 19:22:54,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-17 19:22:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1669, Unknown=3, NotChecked=0, Total=1892 [2022-03-17 19:22:54,675 INFO L87 Difference]: Start difference. First operand 1401 states and 1607 transitions. Second operand has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 43 states have internal predecessors, (159), 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) [2022-03-17 19:22:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:56,919 INFO L93 Difference]: Finished difference Result 1923 states and 2172 transitions. [2022-03-17 19:22:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-17 19:22:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 43 states have internal predecessors, (159), 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 81 [2022-03-17 19:22:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:56,923 INFO L225 Difference]: With dead ends: 1923 [2022-03-17 19:22:56,923 INFO L226 Difference]: Without dead ends: 1341 [2022-03-17 19:22:56,931 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=940, Invalid=6889, Unknown=3, NotChecked=0, Total=7832 [2022-03-17 19:22:56,932 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 756 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 820 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:56,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 146 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1347 Invalid, 0 Unknown, 820 Unchecked, 0.6s Time] [2022-03-17 19:22:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-03-17 19:22:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 916. [2022-03-17 19:22:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 911 states have (on average 1.137211855104281) internal successors, (1036), 911 states have internal predecessors, (1036), 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) [2022-03-17 19:22:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1040 transitions. [2022-03-17 19:22:57,216 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1040 transitions. Word has length 81 [2022-03-17 19:22:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:57,216 INFO L478 AbstractCegarLoop]: Abstraction has 916 states and 1040 transitions. [2022-03-17 19:22:57,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 43 states have internal predecessors, (159), 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) [2022-03-17 19:22:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1040 transitions. [2022-03-17 19:22:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-17 19:22:57,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:57,218 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:57,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:57,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-17 19:22:57,451 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash -459237146, now seen corresponding path program 8 times [2022-03-17 19:22:57,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:57,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330662489] [2022-03-17 19:22:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:57,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:57,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-17 19:22:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330662489] [2022-03-17 19:22:57,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330662489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854599810] [2022-03-17 19:22:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:22:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:57,828 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:57,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-17 19:22:57,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:22:57,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:57,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-17 19:22:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:58,857 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 19:22:58,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2022-03-17 19:22:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 35 proven. 77 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-17 19:22:58,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:23:01,053 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-17 19:23:01,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 37 [2022-03-17 19:23:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-17 19:23:01,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854599810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:23:01,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:23:01,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 18] total 52 [2022-03-17 19:23:01,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349888358] [2022-03-17 19:23:01,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:23:01,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-17 19:23:01,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:23:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-17 19:23:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2333, Unknown=3, NotChecked=0, Total=2652 [2022-03-17 19:23:01,162 INFO L87 Difference]: Start difference. First operand 916 states and 1040 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 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) [2022-03-17 19:23:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:23:03,487 INFO L93 Difference]: Finished difference Result 1783 states and 2006 transitions. [2022-03-17 19:23:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-17 19:23:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 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 82 [2022-03-17 19:23:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:23:03,491 INFO L225 Difference]: With dead ends: 1783 [2022-03-17 19:23:03,491 INFO L226 Difference]: Without dead ends: 1537 [2022-03-17 19:23:03,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1049, Invalid=6088, Unknown=3, NotChecked=0, Total=7140 [2022-03-17 19:23:03,492 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 508 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 19:23:03,493 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 136 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1750 Invalid, 0 Unknown, 349 Unchecked, 0.6s Time] [2022-03-17 19:23:03,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-03-17 19:23:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 834. [2022-03-17 19:23:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.1399276236429432) internal successors, (945), 829 states have internal predecessors, (945), 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) [2022-03-17 19:23:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 949 transitions. [2022-03-17 19:23:03,777 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 949 transitions. Word has length 82 [2022-03-17 19:23:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:23:03,778 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 949 transitions. [2022-03-17 19:23:03,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 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) [2022-03-17 19:23:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 949 transitions. [2022-03-17 19:23:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-17 19:23:03,779 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:23:03,779 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:23:03,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-17 19:23:03,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-17 19:23:03,986 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:23:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:23:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1483100511, now seen corresponding path program 9 times [2022-03-17 19:23:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:23:03,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870628183] [2022-03-17 19:23:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:23:03,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:23:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:04,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:23:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-03-17 19:23:04,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:23:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870628183] [2022-03-17 19:23:04,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870628183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:23:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522441678] [2022-03-17 19:23:04,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:23:04,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:23:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:23:04,162 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:23:04,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-17 19:23:04,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-17 19:23:04,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:23:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 19:23:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:23:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-03-17 19:23:04,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:23:05,359 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-03-17 19:23:05,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-03-17 19:23:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-03-17 19:23:05,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522441678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:23:05,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:23:05,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-03-17 19:23:05,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84733861] [2022-03-17 19:23:05,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:23:05,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-17 19:23:05,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:23:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-17 19:23:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 19:23:05,518 INFO L87 Difference]: Start difference. First operand 834 states and 949 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 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) [2022-03-17 19:23:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:23:11,247 INFO L93 Difference]: Finished difference Result 5570 states and 6403 transitions. [2022-03-17 19:23:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-17 19:23:11,248 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-17 19:23:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:23:11,259 INFO L225 Difference]: With dead ends: 5570 [2022-03-17 19:23:11,260 INFO L226 Difference]: Without dead ends: 5252 [2022-03-17 19:23:11,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1766, Invalid=10006, Unknown=0, NotChecked=0, Total=11772 [2022-03-17 19:23:11,262 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 1550 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 3179 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 3179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-17 19:23:11,262 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 186 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 3179 Invalid, 0 Unknown, 35 Unchecked, 1.7s Time] [2022-03-17 19:23:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5252 states. [2022-03-17 19:23:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5252 to 995. [2022-03-17 19:23:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 990 states have (on average 1.1393939393939394) internal successors, (1128), 990 states have internal predecessors, (1128), 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) [2022-03-17 19:23:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1132 transitions. [2022-03-17 19:23:11,654 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1132 transitions. Word has length 83 [2022-03-17 19:23:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:23:11,654 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1132 transitions. [2022-03-17 19:23:11,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 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) [2022-03-17 19:23:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1132 transitions. [2022-03-17 19:23:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 19:23:11,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:23:11,656 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:23:11,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-17 19:23:11,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-17 19:23:11,859 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:23:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:23:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash -450086571, now seen corresponding path program 10 times [2022-03-17 19:23:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:23:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796408904] [2022-03-17 19:23:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:23:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:23:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:12,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:23:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-17 19:23:12,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:23:12,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796408904] [2022-03-17 19:23:12,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796408904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:23:12,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407895827] [2022-03-17 19:23:12,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:23:12,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:23:12,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:23:12,036 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:23:12,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-17 19:23:12,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:23:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:23:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 19:23:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:23:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-17 19:23:12,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:23:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-17 19:23:12,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407895827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:23:12,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:23:12,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-17 19:23:12,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543717473] [2022-03-17 19:23:12,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:23:12,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 19:23:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:23:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 19:23:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-17 19:23:12,774 INFO L87 Difference]: Start difference. First operand 995 states and 1132 transitions. Second operand has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 23 states have internal predecessors, (145), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:23:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:23:14,304 INFO L93 Difference]: Finished difference Result 1477 states and 1675 transitions. [2022-03-17 19:23:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 19:23:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 23 states have internal predecessors, (145), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-17 19:23:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:23:14,308 INFO L225 Difference]: With dead ends: 1477 [2022-03-17 19:23:14,308 INFO L226 Difference]: Without dead ends: 1472 [2022-03-17 19:23:14,312 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2022-03-17 19:23:14,312 INFO L912 BasicCegarLoop]: 139 mSDtfsCounter, 305 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 19:23:14,312 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 216 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 19:23:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2022-03-17 19:23:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1221. [2022-03-17 19:23:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1216 states have (on average 1.1389802631578947) internal successors, (1385), 1216 states have internal predecessors, (1385), 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) [2022-03-17 19:23:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1389 transitions. [2022-03-17 19:23:14,781 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1389 transitions. Word has length 93 [2022-03-17 19:23:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:23:14,781 INFO L478 AbstractCegarLoop]: Abstraction has 1221 states and 1389 transitions. [2022-03-17 19:23:14,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 23 states have internal predecessors, (145), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:23:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1389 transitions. [2022-03-17 19:23:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 19:23:14,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:23:14,783 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:23:14,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-17 19:23:14,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-17 19:23:14,990 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:23:14,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:23:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash -743489578, now seen corresponding path program 11 times [2022-03-17 19:23:14,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:23:14,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674231497] [2022-03-17 19:23:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:23:14,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:23:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:15,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:23:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 19:23:15,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:23:15,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674231497] [2022-03-17 19:23:15,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674231497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:23:15,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79242741] [2022-03-17 19:23:15,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 19:23:15,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:23:15,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:23:15,712 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:23:15,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-17 19:23:16,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-17 19:23:16,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:23:16,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-17 19:23:16,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:23:16,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:23:16,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:23:16,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:23:16,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 19:23:16,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-17 19:23:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 125 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-03-17 19:23:17,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:23:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-17 19:23:20,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79242741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:23:20,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:23:20,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 16] total 54 [2022-03-17 19:23:20,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251064950] [2022-03-17 19:23:20,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:23:20,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-17 19:23:20,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:23:20,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-17 19:23:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2479, Unknown=3, NotChecked=0, Total=2862 [2022-03-17 19:23:20,678 INFO L87 Difference]: Start difference. First operand 1221 states and 1389 transitions. Second operand has 54 states, 54 states have (on average 3.537037037037037) internal successors, (191), 53 states have internal predecessors, (191), 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) [2022-03-17 19:23:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:23:26,365 INFO L93 Difference]: Finished difference Result 4744 states and 5415 transitions. [2022-03-17 19:23:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-17 19:23:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.537037037037037) internal successors, (191), 53 states have internal predecessors, (191), 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 93 [2022-03-17 19:23:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:23:26,372 INFO L225 Difference]: With dead ends: 4744 [2022-03-17 19:23:26,372 INFO L226 Difference]: Without dead ends: 4383 [2022-03-17 19:23:26,373 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 178 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6021 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2301, Invalid=16602, Unknown=3, NotChecked=0, Total=18906 [2022-03-17 19:23:26,374 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 1311 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2973 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 2973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-17 19:23:26,374 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 154 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 2973 Invalid, 0 Unknown, 567 Unchecked, 1.3s Time] [2022-03-17 19:23:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2022-03-17 19:23:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 1982. [2022-03-17 19:23:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1977 states have (on average 1.1350531107739) internal successors, (2244), 1977 states have internal predecessors, (2244), 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) [2022-03-17 19:23:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2248 transitions. [2022-03-17 19:23:27,185 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2248 transitions. Word has length 93 [2022-03-17 19:23:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:23:27,185 INFO L478 AbstractCegarLoop]: Abstraction has 1982 states and 2248 transitions. [2022-03-17 19:23:27,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.537037037037037) internal successors, (191), 53 states have internal predecessors, (191), 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) [2022-03-17 19:23:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2248 transitions. [2022-03-17 19:23:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 19:23:27,187 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:23:27,187 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:23:27,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-17 19:23:27,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:23:27,393 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:23:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:23:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1726663992, now seen corresponding path program 12 times [2022-03-17 19:23:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:23:27,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670825102] [2022-03-17 19:23:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:23:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:23:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:28,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:23:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 19:23:28,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:23:28,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670825102] [2022-03-17 19:23:28,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670825102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:23:28,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021693711] [2022-03-17 19:23:28,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 19:23:28,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:23:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:23:28,262 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:23:28,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-17 19:23:28,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-17 19:23:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:23:28,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-17 19:23:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:23:29,556 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:23:29,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-17 19:23:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 34 proven. 119 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 19:23:29,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:23:29,969 INFO L356 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2022-03-17 19:23:29,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 30 [2022-03-17 19:23:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 23 proven. 119 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-17 19:23:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021693711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:23:30,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:23:30,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 56 [2022-03-17 19:23:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970577182] [2022-03-17 19:23:30,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:23:30,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-17 19:23:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:23:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-17 19:23:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2649, Unknown=0, NotChecked=0, Total=3080 [2022-03-17 19:23:30,308 INFO L87 Difference]: Start difference. First operand 1982 states and 2248 transitions. Second operand has 56 states, 56 states have (on average 3.1964285714285716) internal successors, (179), 55 states have internal predecessors, (179), 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) [2022-03-17 19:23:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:23:42,703 INFO L93 Difference]: Finished difference Result 7684 states and 8833 transitions. [2022-03-17 19:23:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-17 19:23:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.1964285714285716) internal successors, (179), 55 states have internal predecessors, (179), 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 93 [2022-03-17 19:23:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:23:42,722 INFO L225 Difference]: With dead ends: 7684 [2022-03-17 19:23:42,722 INFO L226 Difference]: Without dead ends: 6521 [2022-03-17 19:23:42,725 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 156 SyntacticMatches, 8 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12530 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3989, Invalid=30793, Unknown=0, NotChecked=0, Total=34782 [2022-03-17 19:23:42,726 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 1873 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 4087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:23:42,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1873 Valid, 136 Invalid, 4087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-17 19:23:42,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6521 states. [2022-03-17 19:23:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6521 to 3120. [2022-03-17 19:23:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3115 states have (on average 1.1534510433386838) internal successors, (3593), 3115 states have internal predecessors, (3593), 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) [2022-03-17 19:23:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 3597 transitions. [2022-03-17 19:23:44,075 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 3597 transitions. Word has length 93 [2022-03-17 19:23:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:23:44,075 INFO L478 AbstractCegarLoop]: Abstraction has 3120 states and 3597 transitions. [2022-03-17 19:23:44,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.1964285714285716) internal successors, (179), 55 states have internal predecessors, (179), 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) [2022-03-17 19:23:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 3597 transitions. [2022-03-17 19:23:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 19:23:44,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:23:44,078 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:23:44,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-17 19:23:44,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:23:44,296 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:23:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:23:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2144140246, now seen corresponding path program 13 times [2022-03-17 19:23:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:23:44,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184640814] [2022-03-17 19:23:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:23:44,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:23:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:45,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:23:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 19:23:45,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:23:45,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184640814] [2022-03-17 19:23:45,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184640814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:23:45,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833806707] [2022-03-17 19:23:45,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 19:23:45,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:23:45,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:23:45,310 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:23:45,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-17 19:23:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:45,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-17 19:23:45,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:23:45,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 19:23:45,978 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:23:45,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-03-17 19:23:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 123 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-17 19:23:45,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:23:46,184 INFO L356 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-03-17 19:23:46,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 75 [2022-03-17 19:23:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-17 19:23:46,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833806707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:23:46,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:23:46,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 13] total 40 [2022-03-17 19:23:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533248925] [2022-03-17 19:23:46,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:23:46,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-17 19:23:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:23:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-17 19:23:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 19:23:46,349 INFO L87 Difference]: Start difference. First operand 3120 states and 3597 transitions. Second operand has 40 states, 40 states have (on average 4.1) internal successors, (164), 39 states have internal predecessors, (164), 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) [2022-03-17 19:23:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:23:50,478 INFO L93 Difference]: Finished difference Result 5726 states and 6383 transitions. [2022-03-17 19:23:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-17 19:23:50,479 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 39 states have internal predecessors, (164), 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 93 [2022-03-17 19:23:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:23:50,484 INFO L225 Difference]: With dead ends: 5726 [2022-03-17 19:23:50,484 INFO L226 Difference]: Without dead ends: 4244 [2022-03-17 19:23:50,486 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=763, Invalid=4787, Unknown=0, NotChecked=0, Total=5550 [2022-03-17 19:23:50,486 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 659 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 19:23:50,486 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 121 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 19:23:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2022-03-17 19:23:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 2996. [2022-03-17 19:23:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2991 states have (on average 1.1350718823136074) internal successors, (3395), 2991 states have internal predecessors, (3395), 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) [2022-03-17 19:23:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 3399 transitions. [2022-03-17 19:23:51,805 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 3399 transitions. Word has length 93 [2022-03-17 19:23:51,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:23:51,805 INFO L478 AbstractCegarLoop]: Abstraction has 2996 states and 3399 transitions. [2022-03-17 19:23:51,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 39 states have internal predecessors, (164), 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) [2022-03-17 19:23:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 3399 transitions. [2022-03-17 19:23:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 19:23:51,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:23:51,808 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:23:51,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-17 19:23:52,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-17 19:23:52,026 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:23:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:23:52,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2047250744, now seen corresponding path program 14 times [2022-03-17 19:23:52,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:23:52,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383143689] [2022-03-17 19:23:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:23:52,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:23:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:53,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:23:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:23:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 19:23:53,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:23:53,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383143689] [2022-03-17 19:23:53,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383143689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:23:53,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855220449] [2022-03-17 19:23:53,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:23:53,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:23:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:23:53,049 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:23:53,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-17 19:23:53,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:23:53,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:23:53,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-17 19:23:53,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:23:53,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 19:23:53,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 19:23:53,860 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:23:53,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-03-17 19:23:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 145 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-17 19:23:53,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:23:54,163 INFO L356 Elim1Store]: treesize reduction 27, result has 72.2 percent of original size [2022-03-17 19:23:54,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 77 [2022-03-17 19:23:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-03-17 19:23:54,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855220449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:23:54,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:23:54,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 15] total 47 [2022-03-17 19:23:54,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975418977] [2022-03-17 19:23:54,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:23:54,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-17 19:23:54,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:23:54,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-17 19:23:54,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2022-03-17 19:23:54,399 INFO L87 Difference]: Start difference. First operand 2996 states and 3399 transitions. Second operand has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 46 states have internal predecessors, (175), 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) [2022-03-17 19:23:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:23:59,383 INFO L93 Difference]: Finished difference Result 4661 states and 5174 transitions. [2022-03-17 19:23:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-17 19:23:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 46 states have internal predecessors, (175), 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 93 [2022-03-17 19:23:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:23:59,389 INFO L225 Difference]: With dead ends: 4661 [2022-03-17 19:23:59,389 INFO L226 Difference]: Without dead ends: 4217 [2022-03-17 19:23:59,390 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1086, Invalid=8034, Unknown=0, NotChecked=0, Total=9120 [2022-03-17 19:23:59,391 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 798 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:23:59,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 106 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-17 19:23:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2022-03-17 19:24:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 2992. [2022-03-17 19:24:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2987 states have (on average 1.1352527619685302) internal successors, (3391), 2987 states have internal predecessors, (3391), 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) [2022-03-17 19:24:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 3395 transitions. [2022-03-17 19:24:00,716 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 3395 transitions. Word has length 93 [2022-03-17 19:24:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:24:00,716 INFO L478 AbstractCegarLoop]: Abstraction has 2992 states and 3395 transitions. [2022-03-17 19:24:00,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 46 states have internal predecessors, (175), 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) [2022-03-17 19:24:00,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 3395 transitions. [2022-03-17 19:24:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 19:24:00,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:24:00,719 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:24:00,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-17 19:24:00,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:24:00,942 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:24:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:24:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1778286904, now seen corresponding path program 15 times [2022-03-17 19:24:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:24:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426790889] [2022-03-17 19:24:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:24:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:24:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:24:01,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:24:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:24:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 82 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 19:24:01,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:24:01,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426790889] [2022-03-17 19:24:01,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426790889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:24:01,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945603604] [2022-03-17 19:24:01,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:24:01,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:24:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:24:01,588 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:24:01,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-17 19:24:01,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-17 19:24:01,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:24:01,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 175 conjunts are in the unsatisfiable core [2022-03-17 19:24:01,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:24:02,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-17 19:24:02,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-17 19:24:02,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-17 19:24:02,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-17 19:24:02,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-03-17 19:24:02,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-03-17 19:24:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 58 proven. 112 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-17 19:24:14,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:24:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 23 proven. 144 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 19:24:42,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945603604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:24:42,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:24:42,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 48, 53] total 114 [2022-03-17 19:24:42,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107960013] [2022-03-17 19:24:42,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:24:42,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-17 19:24:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:24:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-17 19:24:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1902, Invalid=10979, Unknown=1, NotChecked=0, Total=12882 [2022-03-17 19:24:42,788 INFO L87 Difference]: Start difference. First operand 2992 states and 3395 transitions. Second operand has 114 states, 114 states have (on average 1.8333333333333333) internal successors, (209), 113 states have internal predecessors, (209), 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) [2022-03-17 19:25:52,140 WARN L232 SmtUtils]: Spent 22.13s on a formula simplification. DAG size of input: 125 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:26:20,468 WARN L232 SmtUtils]: Spent 20.14s on a formula simplification. DAG size of input: 124 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:27:19,461 WARN L232 SmtUtils]: Spent 39.47s on a formula simplification. DAG size of input: 143 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:27:49,566 WARN L232 SmtUtils]: Spent 24.92s on a formula simplification. DAG size of input: 136 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:28:38,354 WARN L232 SmtUtils]: Spent 22.04s on a formula simplification. DAG size of input: 150 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:30:48,981 WARN L232 SmtUtils]: Spent 1.96m on a formula simplification. DAG size of input: 129 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:32:31,373 WARN L232 SmtUtils]: Spent 1.41m on a formula simplification. DAG size of input: 136 DAG size of output: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:32:39,255 WARN L232 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 126 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:33:14,045 WARN L232 SmtUtils]: Spent 14.51s on a formula simplification. DAG size of input: 112 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:33:33,473 WARN L232 SmtUtils]: Spent 14.36s on a formula simplification. DAG size of input: 145 DAG size of output: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:34:08,426 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-03-17 19:34:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-17 19:34:08,429 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 126 SyntacticMatches, 21 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23099 ImplicationChecksByTransitivity, 550.3s TimeCoverageRelationStatistics Valid=8521, Invalid=53682, Unknown=47, NotChecked=0, Total=62250 [2022-03-17 19:34:08,430 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 1074 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 3637 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 5923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1557 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-17 19:34:08,430 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1074 Valid, 277 Invalid, 5923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3637 Invalid, 0 Unknown, 1557 Unchecked, 2.8s Time] [2022-03-17 19:34:08,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-03-17 19:34:08,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-17 19:34:08,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:34:08,638 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:164) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:852) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:769) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:470) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:421) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 56 more [2022-03-17 19:34:08,643 INFO L158 Benchmark]: Toolchain (without parser) took 749448.00ms. Allocated memory was 169.9MB in the beginning and 1.0GB in the end (delta: 857.7MB). Free memory was 117.1MB in the beginning and 429.4MB in the end (delta: -312.2MB). Peak memory consumption was 546.0MB. Max. memory is 8.0GB. [2022-03-17 19:34:08,643 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 169.9MB. Free memory is still 134.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 19:34:08,643 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.25ms. Allocated memory is still 169.9MB. Free memory was 116.9MB in the beginning and 145.0MB in the end (delta: -28.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 19:34:08,643 INFO L158 Benchmark]: Boogie Preprocessor took 49.83ms. Allocated memory is still 169.9MB. Free memory was 145.0MB in the beginning and 143.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:34:08,643 INFO L158 Benchmark]: RCFGBuilder took 321.70ms. Allocated memory is still 169.9MB. Free memory was 143.5MB in the beginning and 130.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-17 19:34:08,643 INFO L158 Benchmark]: IcfgTransformer took 24.37ms. Allocated memory is still 169.9MB. Free memory was 130.7MB in the beginning and 129.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 19:34:08,643 INFO L158 Benchmark]: TraceAbstraction took 748806.86ms. Allocated memory was 169.9MB in the beginning and 1.0GB in the end (delta: 857.7MB). Free memory was 128.8MB in the beginning and 429.4MB in the end (delta: -300.5MB). Peak memory consumption was 559.9MB. Max. memory is 8.0GB. [2022-03-17 19:34:08,644 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 169.9MB. Free memory is still 134.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 239.25ms. Allocated memory is still 169.9MB. Free memory was 116.9MB in the beginning and 145.0MB in the end (delta: -28.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 49.83ms. Allocated memory is still 169.9MB. Free memory was 145.0MB in the beginning and 143.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 321.70ms. Allocated memory is still 169.9MB. Free memory was 143.5MB in the beginning and 130.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 24.37ms. Allocated memory is still 169.9MB. Free memory was 130.7MB in the beginning and 129.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 748806.86ms. Allocated memory was 169.9MB in the beginning and 1.0GB in the end (delta: 857.7MB). Free memory was 128.8MB in the beginning and 429.4MB in the end (delta: -300.5MB). Peak memory consumption was 559.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...