/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/prodbin-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 08:59:15,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 08:59:15,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 08:59:15,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 08:59:15,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 08:59:15,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 08:59:15,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 08:59:15,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 08:59:15,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 08:59:15,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 08:59:15,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 08:59:15,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 08:59:15,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 08:59:15,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 08:59:15,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 08:59:15,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 08:59:15,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 08:59:15,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 08:59:15,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 08:59:15,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 08:59:15,427 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 08:59:15,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 08:59:15,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 08:59:15,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 08:59:15,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 08:59:15,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 08:59:15,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 08:59:15,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 08:59:15,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 08:59:15,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 08:59:15,460 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 08:59:15,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 08:59:15,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 08:59:15,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 08:59:15,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 08:59:15,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 08:59:15,462 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 08:59:15,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 08:59:15,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 08:59:15,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 08:59:15,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:59:15,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 08:59:15,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 08:59:15,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 08:59:15,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 08:59:15,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 08:59:15,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 08:59:15,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 08:59:15,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 08:59:15,465 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 08:59:15,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 08:59:15,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 08:59:15,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 08:59:15,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 08:59:15,666 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 08:59:15,667 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 08:59:15,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2022-04-05 08:59:15,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1b0a70e/40f82b8931cd47469a562690b39fe05f/FLAGb076f9247 [2022-04-05 08:59:16,088 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 08:59:16,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2022-04-05 08:59:16,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1b0a70e/40f82b8931cd47469a562690b39fe05f/FLAGb076f9247 [2022-04-05 08:59:16,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1b0a70e/40f82b8931cd47469a562690b39fe05f [2022-04-05 08:59:16,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 08:59:16,500 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 08:59:16,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 08:59:16,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 08:59:16,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 08:59:16,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@762024d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16, skipping insertion in model container [2022-04-05 08:59:16,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 08:59:16,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 08:59:16,616 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/prodbin-ll_unwindbound5.c[537,550] [2022-04-05 08:59:16,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:59:16,631 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 08:59:16,638 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/prodbin-ll_unwindbound5.c[537,550] [2022-04-05 08:59:16,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:59:16,648 INFO L208 MainTranslator]: Completed translation [2022-04-05 08:59:16,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16 WrapperNode [2022-04-05 08:59:16,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 08:59:16,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 08:59:16,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 08:59:16,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 08:59:16,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 08:59:16,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 08:59:16,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 08:59:16,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 08:59:16,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:59:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:16,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 08:59:16,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 08:59:16,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 08:59:16,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 08:59:16,752 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 08:59:16,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 08:59:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 08:59:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 08:59:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 08:59:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 08:59:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 08:59:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 08:59:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 08:59:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 08:59:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 08:59:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 08:59:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 08:59:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 08:59:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 08:59:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 08:59:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 08:59:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 08:59:16,798 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 08:59:16,799 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 08:59:16,876 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 08:59:16,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 08:59:16,880 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 08:59:16,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:59:16 BoogieIcfgContainer [2022-04-05 08:59:16,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 08:59:16,881 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 08:59:16,881 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 08:59:16,882 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 08:59:16,884 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:59:16" (1/1) ... [2022-04-05 08:59:16,885 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 08:59:16,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:59:16 BasicIcfg [2022-04-05 08:59:16,895 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 08:59:16,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 08:59:16,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 08:59:16,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 08:59:16,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 08:59:16" (1/4) ... [2022-04-05 08:59:16,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1087228c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:59:16, skipping insertion in model container [2022-04-05 08:59:16,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:16" (2/4) ... [2022-04-05 08:59:16,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1087228c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:59:16, skipping insertion in model container [2022-04-05 08:59:16,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:59:16" (3/4) ... [2022-04-05 08:59:16,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1087228c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 08:59:16, skipping insertion in model container [2022-04-05 08:59:16,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:59:16" (4/4) ... [2022-04-05 08:59:16,901 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.cqvasr [2022-04-05 08:59:16,904 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 08:59:16,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 08:59:16,930 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 08:59:16,934 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 [2022-04-05 08:59:16,934 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 08:59:16,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 08:59:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 08:59:16,946 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:16,946 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:16,946 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2022-04-05 08:59:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:16,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768660658] [2022-04-05 08:59:16,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:16,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:17,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:59:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:17,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:59:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:17,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768660658] [2022-04-05 08:59:17,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768660658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:59:17,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:59:17,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 08:59:17,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867369001] [2022-04-05 08:59:17,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:59:17,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 08:59:17,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:17,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 08:59:17,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:59:17,112 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:59:17,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:17,179 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-05 08:59:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 08:59:17,182 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), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 08:59:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:17,186 INFO L225 Difference]: With dead ends: 52 [2022-04-05 08:59:17,186 INFO L226 Difference]: Without dead ends: 26 [2022-04-05 08:59:17,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:59:17,190 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:17,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:59:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-05 08:59:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-05 08:59:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 08:59:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-05 08:59:17,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-04-05 08:59:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:17,231 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-05 08:59:17,231 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), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:59:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-05 08:59:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:59:17,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:17,233 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:17,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 08:59:17,233 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:17,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:17,235 INFO L85 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2022-04-05 08:59:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:17,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945097742] [2022-04-05 08:59:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:17,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:17,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:17,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115743785] [2022-04-05 08:59:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:17,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:17,288 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) [2022-04-05 08:59:17,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 08:59:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 08:59:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:17,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:59:17,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945097742] [2022-04-05 08:59:17,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115743785] [2022-04-05 08:59:17,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115743785] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:59:17,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:59:17,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 08:59:17,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317543948] [2022-04-05 08:59:17,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:59:17,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 08:59:17,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:17,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 08:59:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:59:17,415 INFO L87 Difference]: Start difference. First operand 25 states and 28 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) [2022-04-05 08:59:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:17,423 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-05 08:59:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 08:59:17,423 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 [2022-04-05 08:59:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:17,424 INFO L225 Difference]: With dead ends: 34 [2022-04-05 08:59:17,424 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 08:59:17,424 INFO L912 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 [2022-04-05 08:59:17,425 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:17,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 08:59:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-05 08:59:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 08:59:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-05 08:59:17,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-04-05 08:59:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:17,430 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-05 08:59:17,430 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) [2022-04-05 08:59:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-05 08:59:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:59:17,431 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:17,431 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:17,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:17,670 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 [2022-04-05 08:59:17,671 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2022-04-05 08:59:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3096524] [2022-04-05 08:59:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:17,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:17,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:17,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684067109] [2022-04-05 08:59:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:17,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:17,709 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) [2022-04-05 08:59:17,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 08:59:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 08:59:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:17,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:59:17,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3096524] [2022-04-05 08:59:17,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684067109] [2022-04-05 08:59:17,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684067109] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:59:17,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:59:17,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:59:17,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965706132] [2022-04-05 08:59:17,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:59:17,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:59:17,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:17,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:59:17,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:59:17,805 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2022-04-05 08:59:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:17,846 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-05 08:59:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:59:17,847 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 [2022-04-05 08:59:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:17,847 INFO L225 Difference]: With dead ends: 38 [2022-04-05 08:59:17,847 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 08:59:17,848 INFO L912 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 [2022-04-05 08:59:17,848 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:17,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 08:59:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-04-05 08:59:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 08:59:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-05 08:59:17,853 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-05 08:59:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:17,853 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-05 08:59:17,853 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) [2022-04-05 08:59:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-05 08:59:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 08:59:17,854 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:17,854 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:17,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:18,070 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 [2022-04-05 08:59:18,070 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2022-04-05 08:59:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:18,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221158220] [2022-04-05 08:59:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:18,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:18,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:18,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378110285] [2022-04-05 08:59:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:18,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:18,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:18,101 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) [2022-04-05 08:59:18,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 08:59:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:18,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:59:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:18,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:59:18,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221158220] [2022-04-05 08:59:18,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378110285] [2022-04-05 08:59:18,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378110285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:59:18,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:59:18,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:59:18,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034744450] [2022-04-05 08:59:18,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:59:18,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:59:18,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:18,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:59:18,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:59:18,207 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:59:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:18,257 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-05 08:59:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 08:59:18,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-05 08:59:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:18,258 INFO L225 Difference]: With dead ends: 42 [2022-04-05 08:59:18,258 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 08:59:18,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:59:18,259 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 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 [2022-04-05 08:59:18,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 08:59:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-04-05 08:59:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 08:59:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-05 08:59:18,263 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-04-05 08:59:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:18,263 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-05 08:59:18,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:59:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-05 08:59:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:59:18,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:18,264 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:18,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:18,478 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 [2022-04-05 08:59:18,478 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2022-04-05 08:59:18,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:18,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436241934] [2022-04-05 08:59:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:18,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:18,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696772817] [2022-04-05 08:59:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:18,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:18,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:18,489 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) [2022-04-05 08:59:18,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 08:59:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:59:18,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:18,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:18,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:18,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436241934] [2022-04-05 08:59:18,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:18,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696772817] [2022-04-05 08:59:18,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696772817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:18,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:18,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 08:59:18,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288612327] [2022-04-05 08:59:18,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:18,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 08:59:18,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 08:59:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:59:18,705 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 08:59:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:18,750 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-04-05 08:59:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 08:59:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-04-05 08:59:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:18,751 INFO L225 Difference]: With dead ends: 70 [2022-04-05 08:59:18,751 INFO L226 Difference]: Without dead ends: 63 [2022-04-05 08:59:18,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 08:59:18,752 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:18,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:18,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-05 08:59:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-04-05 08:59:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 08:59:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-04-05 08:59:18,759 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-04-05 08:59:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:18,759 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-04-05 08:59:18,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 08:59:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-04-05 08:59:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:59:18,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:18,760 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:18,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-05 08:59:18,974 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 [2022-04-05 08:59:18,975 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2022-04-05 08:59:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415497419] [2022-04-05 08:59:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:18,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:18,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479858962] [2022-04-05 08:59:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:18,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:19,000 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) [2022-04-05 08:59:19,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 08:59:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 08:59:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:22,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:25,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:25,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415497419] [2022-04-05 08:59:25,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:25,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479858962] [2022-04-05 08:59:25,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479858962] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:25,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:25,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-05 08:59:25,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090104766] [2022-04-05 08:59:25,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:25,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 08:59:25,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 08:59:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-05 08:59:25,497 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:59:27,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:31,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:32,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:33,172 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2022-04-05 08:59:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 08:59:33,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-05 08:59:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:33,176 INFO L225 Difference]: With dead ends: 94 [2022-04-05 08:59:33,176 INFO L226 Difference]: Without dead ends: 92 [2022-04-05 08:59:33,176 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-04-05 08:59:33,177 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:33,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 151 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-04-05 08:59:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-05 08:59:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-04-05 08:59:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 08:59:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-04-05 08:59:33,187 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 28 [2022-04-05 08:59:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:33,187 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-04-05 08:59:33,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:59:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-04-05 08:59:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:59:33,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:33,188 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:33,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-05 08:59:33,389 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 [2022-04-05 08:59:33,392 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2022-04-05 08:59:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:33,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185501011] [2022-04-05 08:59:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:33,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:33,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508665540] [2022-04-05 08:59:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:33,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:33,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:33,403 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) [2022-04-05 08:59:33,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 08:59:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:33,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 08:59:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:34,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:34,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:34,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185501011] [2022-04-05 08:59:34,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:34,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508665540] [2022-04-05 08:59:34,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508665540] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:34,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:34,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-04-05 08:59:34,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416296815] [2022-04-05 08:59:34,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:34,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 08:59:34,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 08:59:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-04-05 08:59:34,903 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:59:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:35,987 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2022-04-05 08:59:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 08:59:35,988 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-04-05 08:59:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:35,989 INFO L225 Difference]: With dead ends: 123 [2022-04-05 08:59:35,989 INFO L226 Difference]: Without dead ends: 112 [2022-04-05 08:59:35,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-04-05 08:59:35,990 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:35,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 179 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 08:59:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-05 08:59:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-04-05 08:59:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 08:59:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-04-05 08:59:35,998 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2022-04-05 08:59:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:35,998 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-04-05 08:59:35,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:59:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-04-05 08:59:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 08:59:35,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:35,999 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:36,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:36,227 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 [2022-04-05 08:59:36,228 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2022-04-05 08:59:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:36,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530053620] [2022-04-05 08:59:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:36,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:36,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:36,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758697081] [2022-04-05 08:59:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:36,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:36,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:36,243 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) [2022-04-05 08:59:36,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 08:59:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 08:59:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 08:59:36,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 08:59:36,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530053620] [2022-04-05 08:59:36,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758697081] [2022-04-05 08:59:36,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758697081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:36,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:36,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-05 08:59:36,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947756454] [2022-04-05 08:59:36,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:36,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 08:59:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 08:59:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 08:59:36,466 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 08:59:38,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:38,587 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2022-04-05 08:59:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 08:59:38,587 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-05 08:59:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:38,588 INFO L225 Difference]: With dead ends: 100 [2022-04-05 08:59:38,588 INFO L226 Difference]: Without dead ends: 90 [2022-04-05 08:59:38,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 08:59:38,589 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:38,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 108 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-05 08:59:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-05 08:59:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-04-05 08:59:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 08:59:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-04-05 08:59:38,598 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 34 [2022-04-05 08:59:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:38,598 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-04-05 08:59:38,598 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 08:59:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-04-05 08:59:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-05 08:59:38,599 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:38,599 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:38,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-05 08:59:38,811 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 [2022-04-05 08:59:38,813 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:38,813 INFO L85 PathProgramCache]: Analyzing trace with hash 199111383, now seen corresponding path program 1 times [2022-04-05 08:59:38,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:38,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706283957] [2022-04-05 08:59:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:38,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:38,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29921387] [2022-04-05 08:59:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:38,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:38,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:38,852 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) [2022-04-05 08:59:38,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 08:59:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:38,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 08:59:38,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:43,906 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:00:06,937 WARN L232 SmtUtils]: Spent 12.18s on a formula simplification. DAG size of input: 64 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 09:01:15,479 WARN L232 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-05 09:03:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 09:03:28,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:03:33,828 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:03:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 09:03:41,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:03:41,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706283957] [2022-04-05 09:03:41,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:03:41,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29921387] [2022-04-05 09:03:41,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29921387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:03:41,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:03:41,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-04-05 09:03:41,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160031047] [2022-04-05 09:03:41,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:03:41,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 09:03:41,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:03:41,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 09:03:41,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=454, Unknown=4, NotChecked=0, Total=552 [2022-04-05 09:03:41,345 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:04:44,482 WARN L232 SmtUtils]: Spent 58.80s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 09:04:51,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:05:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:01,041 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2022-04-05 09:05:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 09:05:01,041 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-04-05 09:05:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:01,042 INFO L225 Difference]: With dead ends: 127 [2022-04-05 09:05:01,042 INFO L226 Difference]: Without dead ends: 125 [2022-04-05 09:05:01,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 103.7s TimeCoverageRelationStatistics Valid=191, Invalid=993, Unknown=6, NotChecked=0, Total=1190 [2022-04-05 09:05:01,043 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:01,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 273 Invalid, 1 Unknown, 36 Unchecked, 5.4s Time] [2022-04-05 09:05:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-05 09:05:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-04-05 09:05:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 94 states have (on average 1.148936170212766) internal successors, (108), 98 states have internal predecessors, (108), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 09:05:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2022-04-05 09:05:01,075 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 48 [2022-04-05 09:05:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:01,075 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2022-04-05 09:05:01,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:05:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2022-04-05 09:05:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 09:05:01,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:01,077 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:01,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 09:05:01,294 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 [2022-04-05 09:05:01,294 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash -831185954, now seen corresponding path program 2 times [2022-04-05 09:05:01,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:01,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396292714] [2022-04-05 09:05:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:01,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:05:01,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414760325] [2022-04-05 09:05:01,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:05:01,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:01,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:01,321 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) [2022-04-05 09:05:01,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 09:05:01,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:05:01,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:05:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 09:05:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:05:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:05:01,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:05:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 09:05:01,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:05:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396292714] [2022-04-05 09:05:01,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:05:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414760325] [2022-04-05 09:05:01,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414760325] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:05:01,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:05:01,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-05 09:05:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698922356] [2022-04-05 09:05:01,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:05:01,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 09:05:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:05:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 09:05:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 09:05:01,976 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 09:05:02,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:02,127 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2022-04-05 09:05:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 09:05:02,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-04-05 09:05:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:02,128 INFO L225 Difference]: With dead ends: 152 [2022-04-05 09:05:02,128 INFO L226 Difference]: Without dead ends: 145 [2022-04-05 09:05:02,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:05:02,129 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:02,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 111 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:05:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-05 09:05:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-04-05 09:05:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 117 states have internal predecessors, (128), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 09:05:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2022-04-05 09:05:02,139 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 58 [2022-04-05 09:05:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:02,139 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2022-04-05 09:05:02,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 09:05:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2022-04-05 09:05:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 09:05:02,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:02,141 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:02,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-05 09:05:02,358 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 [2022-04-05 09:05:02,358 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash -339082250, now seen corresponding path program 2 times [2022-04-05 09:05:02,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:02,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288517421] [2022-04-05 09:05:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:02,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:05:02,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385531394] [2022-04-05 09:05:02,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:05:02,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:02,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:02,387 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) [2022-04-05 09:05:02,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 09:05:02,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:05:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:05:02,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 09:05:02,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:05:04,765 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:05:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 09:05:06,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:05:11,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:05:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288517421] [2022-04-05 09:05:11,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:05:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385531394] [2022-04-05 09:05:11,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385531394] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:05:11,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:05:11,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-05 09:05:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264410768] [2022-04-05 09:05:11,733 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:05:11,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 09:05:11,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:05:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 09:05:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-04-05 09:05:11,734 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 09:05:14,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:05:15,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:05:18,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:05:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:18,523 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2022-04-05 09:05:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 09:05:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-04-05 09:05:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:18,525 INFO L225 Difference]: With dead ends: 170 [2022-04-05 09:05:18,525 INFO L226 Difference]: Without dead ends: 168 [2022-04-05 09:05:18,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 09:05:18,526 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:18,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 313 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 546 Invalid, 1 Unknown, 45 Unchecked, 6.3s Time] [2022-04-05 09:05:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-05 09:05:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2022-04-05 09:05:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 134 states have internal predecessors, (146), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 09:05:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2022-04-05 09:05:18,536 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 58 [2022-04-05 09:05:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:18,536 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2022-04-05 09:05:18,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 09:05:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2022-04-05 09:05:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 09:05:18,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:18,537 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:18,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-05 09:05:18,751 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 [2022-04-05 09:05:18,751 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1548458294, now seen corresponding path program 3 times [2022-04-05 09:05:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:18,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512768073] [2022-04-05 09:05:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:18,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:18,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:05:18,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989800173] [2022-04-05 09:05:18,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:05:18,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:18,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:18,774 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) [2022-04-05 09:05:18,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 09:05:18,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 09:05:18,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:05:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 09:05:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:05:21,861 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:05:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-05 09:05:25,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:05:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 09:05:30,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:05:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512768073] [2022-04-05 09:05:30,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:05:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989800173] [2022-04-05 09:05:30,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989800173] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:05:30,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:05:30,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-04-05 09:05:30,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261016148] [2022-04-05 09:05:30,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:05:30,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 09:05:30,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:05:30,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 09:05:30,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=322, Unknown=3, NotChecked=0, Total=420 [2022-04-05 09:05:30,035 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:05:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:05:31,750 INFO L93 Difference]: Finished difference Result 190 states and 214 transitions. [2022-04-05 09:05:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 09:05:31,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2022-04-05 09:05:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:05:31,751 INFO L225 Difference]: With dead ends: 190 [2022-04-05 09:05:31,751 INFO L226 Difference]: Without dead ends: 188 [2022-04-05 09:05:31,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=137, Invalid=510, Unknown=3, NotChecked=0, Total=650 [2022-04-05 09:05:31,752 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 09:05:31,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 241 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 229 Invalid, 0 Unknown, 4 Unchecked, 1.5s Time] [2022-04-05 09:05:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-05 09:05:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2022-04-05 09:05:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 90 states have internal predecessors, (100), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 09:05:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2022-04-05 09:05:31,764 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 58 [2022-04-05 09:05:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:05:31,764 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2022-04-05 09:05:31,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:05:31,764 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2022-04-05 09:05:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 09:05:31,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:05:31,765 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:31,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-05 09:05:31,983 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 [2022-04-05 09:05:31,983 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:05:31,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:05:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1880993343, now seen corresponding path program 3 times [2022-04-05 09:05:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:05:31,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061620862] [2022-04-05 09:05:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:05:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:05:31,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:05:31,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63202958] [2022-04-05 09:05:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:05:31,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:05:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:05:31,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:05:31,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 09:05:32,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-05 09:05:32,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-05 09:05:32,105 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-05 09:05:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 09:05:32,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-05 09:05:32,187 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-05 09:05:32,187 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 09:05:32,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 09:05:32,389 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 09:05:32,391 INFO L719 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:05:32,393 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 09:05:32,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:05:32 BasicIcfg [2022-04-05 09:05:32,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 09:05:32,417 INFO L158 Benchmark]: Toolchain (without parser) took 375916.94ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 133.5MB in the beginning and 170.7MB in the end (delta: -37.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:32,417 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 184.5MB. Free memory is still 149.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 09:05:32,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 146.79ms. Allocated memory is still 184.5MB. Free memory was 133.4MB in the beginning and 161.5MB in the end (delta: -28.2MB). Peak memory consumption was 6.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:32,418 INFO L158 Benchmark]: Boogie Preprocessor took 30.23ms. Allocated memory is still 184.5MB. Free memory was 161.5MB in the beginning and 160.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 09:05:32,418 INFO L158 Benchmark]: RCFGBuilder took 193.30ms. Allocated memory is still 184.5MB. Free memory was 160.0MB in the beginning and 149.5MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-05 09:05:32,418 INFO L158 Benchmark]: IcfgTransformer took 14.14ms. Allocated memory is still 184.5MB. Free memory was 149.5MB in the beginning and 148.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:32,418 INFO L158 Benchmark]: TraceAbstraction took 375520.66ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 148.0MB in the beginning and 170.7MB in the end (delta: -22.8MB). Peak memory consumption was 16.0MB. Max. memory is 8.0GB. [2022-04-05 09:05:32,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 184.5MB. Free memory is still 149.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 146.79ms. Allocated memory is still 184.5MB. Free memory was 133.4MB in the beginning and 161.5MB in the end (delta: -28.2MB). Peak memory consumption was 6.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.23ms. Allocated memory is still 184.5MB. Free memory was 161.5MB in the beginning and 160.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 193.30ms. Allocated memory is still 184.5MB. Free memory was 160.0MB in the beginning and 149.5MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 14.14ms. Allocated memory is still 184.5MB. Free memory was 149.5MB in the beginning and 148.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 375520.66ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 148.0MB in the beginning and 170.7MB in the end (delta: -22.8MB). Peak memory consumption was 16.0MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=7, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=4, b=1073741823, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=4, b=1073741823, counter=0, x=4, y=1073741823, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=1, counter++=0, x=4, y=1073741823, z=0] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=1, x=4, y=1073741823, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=1, x=4, y=1073741823, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=1, x=4, y=1073741822, z=4] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=1, x=8, y=536870911, z=4] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=2, counter++=1, x=8, y=536870911, z=4] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=2, x=8, y=536870911, z=4] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=2, x=8, y=536870911, z=4] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=2, x=8, y=536870910, z=12] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=2, x=16, y=268435455, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=3, counter++=2, x=16, y=268435455, z=12] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=3, x=16, y=268435455, z=12] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=3, x=16, y=268435455, z=12] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=3, x=16, y=268435454, z=28] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=3, x=32, y=134217727, z=28] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=4, counter++=3, x=32, y=134217727, z=28] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=4, x=32, y=134217727, z=28] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=4, x=32, y=134217727, z=28] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=4, x=32, y=134217726, z=60] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=4, x=64, y=67108863, z=60] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=5, counter++=4, x=64, y=67108863, z=60] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=5, x=64, y=67108863, z=60] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=5, x=64, y=67108863, z=60] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=5, x=64, y=67108862, z=124] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=5, x=128, y=33554431, z=124] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=6, counter++=5, x=128, y=33554431, z=124] [L33] COND FALSE !(counter++<5) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 375.5s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 99.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 342 SdHoareTripleChecker+Valid, 22.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 330 mSDsluCounter, 1688 SdHoareTripleChecker+Invalid, 22.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 85 IncrementalHoareTripleChecker+Unchecked, 1380 mSDsCounter, 149 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1700 IncrementalHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 149 mSolverCounterUnsat, 308 mSDtfsCounter, 1700 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 751 GetRequests, 562 SyntacticMatches, 17 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 124.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=11, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 117 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 272.0s InterpolantComputationTime, 485 NumberOfCodeBlocks, 475 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 680 ConstructedInterpolants, 6 QuantifiedInterpolants, 4757 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1361 ConjunctsInSsa, 214 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 307/536 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 RESULT: Ultimate proved your program to be incorrect! [2022-04-05 09:05:32,647 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-04-05 09:05:32,691 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 137 Received shutdown request...