/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/nla-digbench-scaling/cohendiv-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 23:05:58,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 23:05:58,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 23:05:58,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 23:05:58,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 23:05:58,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 23:05:58,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 23:05:58,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 23:05:58,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 23:05:58,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 23:05:58,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 23:05:58,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 23:05:58,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 23:05:58,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 23:05:58,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 23:05:58,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 23:05:58,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 23:05:58,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 23:05:58,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 23:05:58,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 23:05:58,448 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 23:05:58,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 23:05:58,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 23:05:58,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 23:05:58,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 23:05:58,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 23:05:58,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 23:05:58,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 23:05:58,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 23:05:58,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 23:05:58,499 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 23:05:58,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 23:05:58,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 23:05:58,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 23:05:58,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 23:05:58,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 23:05:58,502 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 23:05:58,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 23:05:58,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 23:05:58,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 23:05:58,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 23:05:58,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 23:05:58,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 23:05:58,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 23:05:58,504 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 23:05:58,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 23:05:58,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 23:05:58,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 23:05:58,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 23:05:58,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:05:58,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 23:05:58,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 23:05:58,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 23:05:58,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 23:05:58,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 23:05:58,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 23:05:58,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 23:05:58,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 23:05:58,506 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 23:05:58,506 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 23:05:58,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 23:05:58,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 23:05:58,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 23:05:58,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 23:05:58,729 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 23:05:58,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2022-03-18 23:05:58,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d4d6162/f65c1c8110d94c51a7afc468c85fd309/FLAGb485654a7 [2022-03-18 23:05:59,141 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 23:05:59,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2022-03-18 23:05:59,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d4d6162/f65c1c8110d94c51a7afc468c85fd309/FLAGb485654a7 [2022-03-18 23:05:59,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d4d6162/f65c1c8110d94c51a7afc468c85fd309 [2022-03-18 23:05:59,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 23:05:59,162 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 23:05:59,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 23:05:59,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 23:05:59,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 23:05:59,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe81afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59, skipping insertion in model container [2022-03-18 23:05:59,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 23:05:59,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 23:05:59,376 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c[576,589] [2022-03-18 23:05:59,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:05:59,401 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 23:05:59,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c[576,589] [2022-03-18 23:05:59,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:05:59,434 INFO L208 MainTranslator]: Completed translation [2022-03-18 23:05:59,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59 WrapperNode [2022-03-18 23:05:59,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 23:05:59,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 23:05:59,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 23:05:59,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 23:05:59,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 23:05:59,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 23:05:59,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 23:05:59,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 23:05:59,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:05:59,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:05:59,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 23:05:59,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 23:05:59,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 23:05:59,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 23:05:59,534 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 23:05:59,534 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 23:05:59,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 23:05:59,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 23:05:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 23:05:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 23:05:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 23:05:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 23:05:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 23:05:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 23:05:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 23:05:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 23:05:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 23:05:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 23:05:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 23:05:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 23:05:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 23:05:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 23:05:59,590 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 23:05:59,591 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 23:05:59,716 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 23:05:59,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 23:05:59,722 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 23:05:59,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:05:59 BoogieIcfgContainer [2022-03-18 23:05:59,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 23:05:59,724 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 23:05:59,725 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 23:05:59,725 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 23:05:59,728 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:05:59" (1/1) ... [2022-03-18 23:05:59,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:05:59 BasicIcfg [2022-03-18 23:05:59,755 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 23:05:59,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 23:05:59,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 23:05:59,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 23:05:59,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:05:59" (1/4) ... [2022-03-18 23:05:59,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fb48b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:05:59, skipping insertion in model container [2022-03-18 23:05:59,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:05:59" (2/4) ... [2022-03-18 23:05:59,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fb48b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:05:59, skipping insertion in model container [2022-03-18 23:05:59,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:05:59" (3/4) ... [2022-03-18 23:05:59,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fb48b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 11:05:59, skipping insertion in model container [2022-03-18 23:05:59,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:05:59" (4/4) ... [2022-03-18 23:05:59,761 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.cqvasr [2022-03-18 23:05:59,767 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 23:05:59,767 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 23:05:59,798 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 23:05:59,804 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 23:05:59,804 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 23:05:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 23:05:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 23:05:59,821 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:05:59,822 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:05:59,822 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:05:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:05:59,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2022-03-18 23:05:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:05:59,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560845841] [2022-03-18 23:05:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:05:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:05:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:05:59,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 23:05:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:05:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 23:05:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:05:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:05:59,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:05:59,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560845841] [2022-03-18 23:05:59,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560845841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:05:59,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:05:59,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 23:05:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686402656] [2022-03-18 23:05:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:05:59,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 23:05:59,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:05:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 23:05:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:05:59,998 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:06:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:00,108 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-03-18 23:06:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 23:06:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 23:06:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:00,118 INFO L225 Difference]: With dead ends: 68 [2022-03-18 23:06:00,118 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 23:06:00,122 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:06:00,128 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:00,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:06:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 23:06:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-18 23:06:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 23:06:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-03-18 23:06:00,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-03-18 23:06:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:00,172 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-03-18 23:06:00,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:06:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-03-18 23:06:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 23:06:00,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:00,174 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:06:00,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 23:06:00,176 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2022-03-18 23:06:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:00,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795273613] [2022-03-18 23:06:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:00,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:00,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:00,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840045943] [2022-03-18 23:06:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:00,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:00,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:00,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:06:00,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 23:06:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 23:06:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:06:00,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:06:00,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:00,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795273613] [2022-03-18 23:06:00,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:00,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840045943] [2022-03-18 23:06:00,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840045943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:06:00,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:06:00,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 23:06:00,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648397244] [2022-03-18 23:06:00,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:06:00,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 23:06:00,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:00,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 23:06:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 23:06:00,404 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 23:06:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:00,431 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-18 23:06:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 23:06:00,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-18 23:06:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:00,438 INFO L225 Difference]: With dead ends: 42 [2022-03-18 23:06:00,438 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 23:06:00,439 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 23:06:00,440 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:00,441 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:06:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 23:06:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 23:06:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 23:06:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-18 23:06:00,456 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-03-18 23:06:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:00,456 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-18 23:06:00,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 23:06:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-18 23:06:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 23:06:00,457 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:00,457 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:06:00,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:00,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:00,680 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2022-03-18 23:06:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:00,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301118121] [2022-03-18 23:06:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:00,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:00,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33299764] [2022-03-18 23:06:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:00,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:00,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:00,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:06:00,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 23:06:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:06:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:06:00,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:06:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301118121] [2022-03-18 23:06:00,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33299764] [2022-03-18 23:06:00,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33299764] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:06:00,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:06:00,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:06:00,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003734805] [2022-03-18 23:06:00,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:06:00,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:06:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:06:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:06:00,827 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:06:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:00,865 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-18 23:06:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:06:00,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-18 23:06:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:00,868 INFO L225 Difference]: With dead ends: 45 [2022-03-18 23:06:00,868 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 23:06:00,868 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:06:00,870 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:00,871 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:06:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 23:06:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-03-18 23:06:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 23:06:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-18 23:06:00,887 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-03-18 23:06:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:00,887 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-18 23:06:00,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:06:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-18 23:06:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 23:06:00,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:00,889 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] [2022-03-18 23:06:00,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:01,102 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,SelfDestructingSolverStorable2 [2022-03-18 23:06:01,103 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2022-03-18 23:06:01,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:01,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661416035] [2022-03-18 23:06:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:01,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:01,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:01,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417208621] [2022-03-18 23:06:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:01,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:01,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:01,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:06:01,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 23:06:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:01,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:06:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:06:01,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:06:01,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661416035] [2022-03-18 23:06:01,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417208621] [2022-03-18 23:06:01,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417208621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:06:01,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:06:01,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:06:01,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512246729] [2022-03-18 23:06:01,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:06:01,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:06:01,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:06:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:06:01,260 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 23:06:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:01,319 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-18 23:06:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:06:01,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 23:06:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:01,322 INFO L225 Difference]: With dead ends: 58 [2022-03-18 23:06:01,322 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 23:06:01,322 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:06:01,325 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:01,326 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:06:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 23:06:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-18 23:06:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 23:06:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-03-18 23:06:01,342 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-03-18 23:06:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:01,344 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-03-18 23:06:01,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 23:06:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-03-18 23:06:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 23:06:01,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:01,346 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-18 23:06:01,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:01,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:01,569 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:01,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2022-03-18 23:06:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:01,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744299006] [2022-03-18 23:06:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:01,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:01,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592442232] [2022-03-18 23:06:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:01,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:01,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:01,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:06:01,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 23:06:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:06:01,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 23:06:01,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:06:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:01,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744299006] [2022-03-18 23:06:01,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:01,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592442232] [2022-03-18 23:06:01,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592442232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:06:01,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:06:01,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:06:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288668250] [2022-03-18 23:06:01,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:06:01,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:06:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:06:01,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:06:01,696 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 23:06:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:01,764 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2022-03-18 23:06:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:06:01,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-03-18 23:06:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:01,766 INFO L225 Difference]: With dead ends: 83 [2022-03-18 23:06:01,766 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 23:06:01,767 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:06:01,767 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:01,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:06:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 23:06:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-03-18 23:06:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 23:06:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-03-18 23:06:01,777 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-03-18 23:06:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:01,777 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-03-18 23:06:01,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 23:06:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-03-18 23:06:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 23:06:01,778 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:01,778 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-18 23:06:01,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:01,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:01,992 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2022-03-18 23:06:01,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:01,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130505688] [2022-03-18 23:06:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:01,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:02,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:02,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529019031] [2022-03-18 23:06:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:02,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:02,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:06:02,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 23:06:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:02,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:06:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 23:06:02,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:06:02,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130505688] [2022-03-18 23:06:02,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529019031] [2022-03-18 23:06:02,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529019031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:06:02,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:06:02,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:06:02,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179923207] [2022-03-18 23:06:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:06:02,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:06:02,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:06:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:06:02,167 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 23:06:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:02,215 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-03-18 23:06:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:06:02,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-03-18 23:06:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:02,218 INFO L225 Difference]: With dead ends: 113 [2022-03-18 23:06:02,218 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 23:06:02,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:06:02,220 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:02,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:06:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 23:06:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-18 23:06:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 23:06:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-03-18 23:06:02,232 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-03-18 23:06:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:02,233 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-03-18 23:06:02,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 23:06:02,233 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-03-18 23:06:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 23:06:02,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:02,236 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2022-03-18 23:06:02,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:02,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:02,451 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:02,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2022-03-18 23:06:02,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:02,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184266965] [2022-03-18 23:06:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:02,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:02,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:02,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291298633] [2022-03-18 23:06:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:02,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:02,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:02,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:06:02,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 23:06:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:02,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:06:02,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 23:06:02,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:06:02,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184266965] [2022-03-18 23:06:02,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291298633] [2022-03-18 23:06:02,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291298633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:06:02,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:06:02,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 23:06:02,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854804707] [2022-03-18 23:06:02,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:06:02,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 23:06:02,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 23:06:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-18 23:06:02,611 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 23:06:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:02,688 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-03-18 23:06:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 23:06:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-03-18 23:06:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:02,690 INFO L225 Difference]: With dead ends: 84 [2022-03-18 23:06:02,690 INFO L226 Difference]: Without dead ends: 82 [2022-03-18 23:06:02,690 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:06:02,690 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:02,691 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 203 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:06:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-18 23:06:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-18 23:06:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 23:06:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-03-18 23:06:02,700 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-03-18 23:06:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:02,701 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-03-18 23:06:02,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 23:06:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-03-18 23:06:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 23:06:02,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:02,702 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-03-18 23:06:02,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:02,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:02,911 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:02,912 INFO L85 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2022-03-18 23:06:02,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:02,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242502103] [2022-03-18 23:06:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:02,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:02,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:02,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273632447] [2022-03-18 23:06:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:02,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:02,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:02,932 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:06:02,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 23:06:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:06:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 23:06:03,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:06:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 23:06:03,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:03,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242502103] [2022-03-18 23:06:03,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:03,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273632447] [2022-03-18 23:06:03,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273632447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:06:03,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:06:03,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 23:06:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796973882] [2022-03-18 23:06:03,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:06:03,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 23:06:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 23:06:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:06:03,304 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 23:06:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:03,401 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-03-18 23:06:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 23:06:03,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-03-18 23:06:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:03,402 INFO L225 Difference]: With dead ends: 88 [2022-03-18 23:06:03,403 INFO L226 Difference]: Without dead ends: 86 [2022-03-18 23:06:03,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-18 23:06:03,403 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:03,404 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 137 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:06:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-18 23:06:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-18 23:06:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 23:06:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-03-18 23:06:03,414 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-03-18 23:06:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:03,415 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-03-18 23:06:03,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 23:06:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-03-18 23:06:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 23:06:03,416 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:03,416 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1] [2022-03-18 23:06:03,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:03,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:03,631 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2022-03-18 23:06:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:03,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352991361] [2022-03-18 23:06:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:03,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:03,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962304608] [2022-03-18 23:06:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:03,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:03,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:03,642 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:06:03,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 23:06:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:06:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 23:06:03,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:06:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 23:06:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352991361] [2022-03-18 23:06:03,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962304608] [2022-03-18 23:06:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962304608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:06:03,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:06:03,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 23:06:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663094298] [2022-03-18 23:06:03,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:06:03,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 23:06:03,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 23:06:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:06:03,904 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-18 23:06:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:04,043 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-03-18 23:06:04,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 23:06:04,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-03-18 23:06:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:04,045 INFO L225 Difference]: With dead ends: 257 [2022-03-18 23:06:04,045 INFO L226 Difference]: Without dead ends: 250 [2022-03-18 23:06:04,046 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:06:04,046 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 102 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:04,046 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 220 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:06:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-18 23:06:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2022-03-18 23:06:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 161 states have internal predecessors, (182), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 23:06:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 291 transitions. [2022-03-18 23:06:04,073 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 291 transitions. Word has length 50 [2022-03-18 23:06:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:04,074 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 291 transitions. [2022-03-18 23:06:04,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-18 23:06:04,074 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 291 transitions. [2022-03-18 23:06:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 23:06:04,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:04,075 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-03-18 23:06:04,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 23:06:04,300 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,SelfDestructingSolverStorable8 [2022-03-18 23:06:04,301 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2022-03-18 23:06:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:04,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392074696] [2022-03-18 23:06:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:04,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:04,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383351413] [2022-03-18 23:06:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:04,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:04,313 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) [2022-03-18 23:06:04,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 23:06:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:04,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 23:06:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 23:06:04,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:06:04,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:04,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392074696] [2022-03-18 23:06:04,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:04,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383351413] [2022-03-18 23:06:04,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383351413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 23:06:04,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 23:06:04,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 23:06:04,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558940999] [2022-03-18 23:06:04,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 23:06:04,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 23:06:04,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 23:06:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-18 23:06:04,932 INFO L87 Difference]: Start difference. First operand 239 states and 291 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-18 23:06:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:05,126 INFO L93 Difference]: Finished difference Result 318 states and 381 transitions. [2022-03-18 23:06:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 23:06:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-03-18 23:06:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:05,129 INFO L225 Difference]: With dead ends: 318 [2022-03-18 23:06:05,129 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 23:06:05,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-03-18 23:06:05,133 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:05,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 227 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:06:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 23:06:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-03-18 23:06:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 136 states have internal predecessors, (152), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 23:06:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-03-18 23:06:05,158 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 55 [2022-03-18 23:06:05,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:05,158 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-03-18 23:06:05,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-18 23:06:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-03-18 23:06:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 23:06:05,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:05,160 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1] [2022-03-18 23:06:05,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:05,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 23:06:05,379 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash 136506131, now seen corresponding path program 1 times [2022-03-18 23:06:05,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:05,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405268948] [2022-03-18 23:06:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:05,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:05,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:05,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841511496] [2022-03-18 23:06:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:05,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:05,392 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) [2022-03-18 23:06:05,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 23:06:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:05,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:06:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 23:06:05,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:06:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 23:06:05,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:05,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405268948] [2022-03-18 23:06:05,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841511496] [2022-03-18 23:06:05,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841511496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:06:05,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:06:05,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 23:06:05,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399930876] [2022-03-18 23:06:05,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:06:05,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 23:06:05,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:05,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 23:06:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:06:05,711 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-18 23:06:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:05,863 INFO L93 Difference]: Finished difference Result 308 states and 368 transitions. [2022-03-18 23:06:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 23:06:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 63 [2022-03-18 23:06:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:05,868 INFO L225 Difference]: With dead ends: 308 [2022-03-18 23:06:05,868 INFO L226 Difference]: Without dead ends: 214 [2022-03-18 23:06:05,869 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-18 23:06:05,870 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 130 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:05,870 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 206 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:06:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-18 23:06:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2022-03-18 23:06:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 23:06:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-03-18 23:06:05,890 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 63 [2022-03-18 23:06:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:05,890 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-03-18 23:06:05,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-18 23:06:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-03-18 23:06:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 23:06:05,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:06:05,896 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 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, 1, 1, 1] [2022-03-18 23:06:05,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:06,118 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,SelfDestructingSolverStorable10 [2022-03-18 23:06:06,118 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:06:06,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:06:06,119 INFO L85 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2022-03-18 23:06:06,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:06:06,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875769707] [2022-03-18 23:06:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:06:06,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:06:06,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297064450] [2022-03-18 23:06:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:06:06,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:06:06,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:06:06,130 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) [2022-03-18 23:06:06,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 23:06:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:06:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 23:06:06,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:06:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 23:06:06,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:06:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 23:06:06,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:06:06,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875769707] [2022-03-18 23:06:06,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:06:06,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297064450] [2022-03-18 23:06:06,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297064450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:06:06,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:06:06,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-18 23:06:06,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981843300] [2022-03-18 23:06:06,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:06:06,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 23:06:06,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:06:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 23:06:06,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-18 23:06:06,640 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 23:06:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:06:06,990 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2022-03-18 23:06:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 23:06:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 79 [2022-03-18 23:06:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:06:06,991 INFO L225 Difference]: With dead ends: 236 [2022-03-18 23:06:06,991 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 23:06:06,991 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-18 23:06:06,992 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 23:06:06,992 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 354 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 23:06:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 23:06:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 23:06:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 23:06:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 23:06:06,993 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-03-18 23:06:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:06:06,993 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 23:06:06,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 23:06:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 23:06:06,993 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 23:06:06,996 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 23:06:07,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 23:06:07,211 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,SelfDestructingSolverStorable11 [2022-03-18 23:06:07,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 23:06:08,015 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 23:06:08,015 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 23:06:08,015 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 23:06:08,016 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 23:06:08,016 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 23:06:08,016 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 23:06:08,016 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 23:06:08,016 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-18 23:06:08,016 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-18 23:06:08,016 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-18 23:06:08,016 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-18 23:06:08,016 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-18 23:06:08,016 INFO L878 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-18 23:06:08,017 INFO L882 garLoopResultBuilder]: For program point L30-1(line 30) no Hoare annotation was computed. [2022-03-18 23:06:08,017 INFO L878 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-18 23:06:08,017 INFO L878 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-18 23:06:08,017 INFO L882 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2022-03-18 23:06:08,017 INFO L882 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2022-03-18 23:06:08,017 INFO L878 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-18 23:06:08,017 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2022-03-18 23:06:08,017 INFO L878 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-18 23:06:08,017 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2022-03-18 23:06:08,017 INFO L882 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2022-03-18 23:06:08,018 INFO L878 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-18 23:06:08,018 INFO L878 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-18 23:06:08,018 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-18 23:06:08,018 INFO L882 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2022-03-18 23:06:08,018 INFO L882 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2022-03-18 23:06:08,018 INFO L882 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2022-03-18 23:06:08,018 INFO L882 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2022-03-18 23:06:08,018 INFO L878 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (not (<= |old(~counter~0)| 0))) [2022-03-18 23:06:08,018 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-18 23:06:08,018 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-18 23:06:08,018 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-03-18 23:06:08,018 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-03-18 23:06:08,019 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-03-18 23:06:08,019 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-03-18 23:06:08,019 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-03-18 23:06:08,021 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:06:08,025 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 23:06:08,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 11:06:08 BasicIcfg [2022-03-18 23:06:08,039 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 23:06:08,039 INFO L158 Benchmark]: Toolchain (without parser) took 8877.36ms. Allocated memory was 194.0MB in the beginning and 250.6MB in the end (delta: 56.6MB). Free memory was 142.9MB in the beginning and 127.8MB in the end (delta: 15.0MB). Peak memory consumption was 73.1MB. Max. memory is 8.0GB. [2022-03-18 23:06:08,040 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 159.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 23:06:08,040 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.58ms. Allocated memory is still 194.0MB. Free memory was 142.8MB in the beginning and 169.6MB in the end (delta: -26.8MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. [2022-03-18 23:06:08,040 INFO L158 Benchmark]: Boogie Preprocessor took 25.80ms. Allocated memory is still 194.0MB. Free memory was 169.6MB in the beginning and 168.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 23:06:08,041 INFO L158 Benchmark]: RCFGBuilder took 261.14ms. Allocated memory is still 194.0MB. Free memory was 168.0MB in the beginning and 157.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 23:06:08,041 INFO L158 Benchmark]: IcfgTransformer took 30.68ms. Allocated memory is still 194.0MB. Free memory was 157.0MB in the beginning and 156.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 23:06:08,042 INFO L158 Benchmark]: TraceAbstraction took 8282.24ms. Allocated memory was 194.0MB in the beginning and 250.6MB in the end (delta: 56.6MB). Free memory was 155.4MB in the beginning and 127.8MB in the end (delta: 27.6MB). Peak memory consumption was 85.3MB. Max. memory is 8.0GB. [2022-03-18 23:06:08,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 159.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 272.58ms. Allocated memory is still 194.0MB. Free memory was 142.8MB in the beginning and 169.6MB in the end (delta: -26.8MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.80ms. Allocated memory is still 194.0MB. Free memory was 169.6MB in the beginning and 168.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 261.14ms. Allocated memory is still 194.0MB. Free memory was 168.0MB in the beginning and 157.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 30.68ms. Allocated memory is still 194.0MB. Free memory was 157.0MB in the beginning and 156.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 8282.24ms. Allocated memory was 194.0MB in the beginning and 250.6MB in the end (delta: 56.6MB). Free memory was 155.4MB in the beginning and 127.8MB in the end (delta: 27.6MB). Peak memory consumption was 85.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.2s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 451 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 427 mSDsluCounter, 2096 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1568 mSDsCounter, 277 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 957 IncrementalHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 277 mSolverCounterUnsat, 528 mSDtfsCounter, 957 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 653 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=9, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 28 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 129 PreInvPairs, 200 NumberOfFragments, 250 HoareAnnotationTreeSize, 129 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 16 FomulaSimplificationsInter, 2803 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 476 NumberOfCodeBlocks, 476 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 699 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 861/960 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((q * y + r == x && 1 <= r) && 1 <= y) && b == a * y) || !(\old(counter) <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || ((q * y + r == x && 1 <= y) && b == a * y) RESULT: Ultimate proved your program to be correct! [2022-03-18 23:06:08,069 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 0 Received shutdown request...