/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:12:01,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:12:01,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:12:01,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 02:12:01,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 02:12:01,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 02:12:01,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 02:12:01,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 02:12:01,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 02:12:01,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 02:12:01,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 02:12:01,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 02:12:01,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:12:01,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:12:01,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:12:01,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:12:01,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:12:01,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:12:01,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:12:01,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:12:01,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:12:01,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:12:01,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:12:01,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:12:01,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 02:12:01,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 02:12:01,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 02:12:01,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 02:12:01,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 02:12:01,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 02:12:01,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 02:12:01,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 02:12:01,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 02:12:01,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 02:12:01,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 02:12:01,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 02:12:01,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 02:12:01,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 02:12:01,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:12:01,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:12:01,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:12:01,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 02:12:01,815 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:12:01,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:12:01,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:12:01,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:12:01,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:12:01,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:12:01,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:12:01,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:12:01,818 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:12:01,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:12:01,819 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:12:01,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:12:01,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:12:01,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:12:01,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:12:01,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:12:01,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:12:01,820 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:12:01,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:12:01,821 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:12:01,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:12:01,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:12:01,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:12:01,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:12:01,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:12:01,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:12:01,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:12:01,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:12:01,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:12:01,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:12:01,823 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:12:01,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:12:01,823 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:12:01,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:12:01,824 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:12:01,824 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:12:02,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:12:02,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:12:02,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:12:02,059 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:12:02,060 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:12:02,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2023-04-02 02:12:03,131 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:12:03,285 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:12:03,286 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2023-04-02 02:12:03,290 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/205b7d57a/536e43ef6e2e4508a79335896596ee07/FLAG80f58fda8 [2023-04-02 02:12:03,300 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/205b7d57a/536e43ef6e2e4508a79335896596ee07 [2023-04-02 02:12:03,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:12:03,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:12:03,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:12:03,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:12:03,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:12:03,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78af9f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03, skipping insertion in model container [2023-04-02 02:12:03,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:12:03,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:12:03,426 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2023-04-02 02:12:03,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:12:03,468 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:12:03,477 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2023-04-02 02:12:03,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:12:03,506 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:12:03,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03 WrapperNode [2023-04-02 02:12:03,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:12:03,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:12:03,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:12:03,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:12:03,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,534 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:12:03,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:12:03,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:12:03,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:12:03,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (1/1) ... [2023-04-02 02:12:03,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:12:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:03,564 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) [2023-04-02 02:12:03,569 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 [2023-04-02 02:12:03,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:12:03,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:12:03,593 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:12:03,593 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:12:03,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:12:03,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:12:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:12:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:12:03,646 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:12:03,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:12:03,773 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:12:03,778 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:12:03,779 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 02:12:03,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:12:03 BoogieIcfgContainer [2023-04-02 02:12:03,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:12:03,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:12:03,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:12:03,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:12:03,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:12:03" (1/3) ... [2023-04-02 02:12:03,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4885dc2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:12:03, skipping insertion in model container [2023-04-02 02:12:03,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:03" (2/3) ... [2023-04-02 02:12:03,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4885dc2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:12:03, skipping insertion in model container [2023-04-02 02:12:03,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:12:03" (3/3) ... [2023-04-02 02:12:03,786 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2023-04-02 02:12:03,811 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:12:03,811 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:12:03,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:12:03,895 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@54ab2d71, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:12:03,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:12:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 02:12:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 02:12:03,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:03,920 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:03,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:03,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:03,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2023-04-02 02:12:03,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:03,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21995196] [2023-04-02 02:12:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:04,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21995196] [2023-04-02 02:12:04,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 02:12:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180692581] [2023-04-02 02:12:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:04,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:04,076 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) [2023-04-02 02:12:04,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 02:12:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:04,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 02:12:04,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 02:12:04,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:12:04,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180692581] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:12:04,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:12:04,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 02:12:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938643912] [2023-04-02 02:12:04,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:12:04,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 02:12:04,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 02:12:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:12:04,224 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:12:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:04,248 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2023-04-02 02:12:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 02:12:04,250 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2023-04-02 02:12:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:04,256 INFO L225 Difference]: With dead ends: 73 [2023-04-02 02:12:04,256 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 02:12:04,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:12:04,268 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:04,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:12:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 02:12:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 02:12:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 02:12:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2023-04-02 02:12:04,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2023-04-02 02:12:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:04,305 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2023-04-02 02:12:04,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:12:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2023-04-02 02:12:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 02:12:04,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:04,307 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:04,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:04,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 02:12:04,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:04,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2023-04-02 02:12:04,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:04,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661984064] [2023-04-02 02:12:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:04,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:04,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:04,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098572740] [2023-04-02 02:12:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:04,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:04,537 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) [2023-04-02 02:12:04,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 02:12:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:04,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:12:04,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:12:04,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:12:04,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661984064] [2023-04-02 02:12:04,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098572740] [2023-04-02 02:12:04,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098572740] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:12:04,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:12:04,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:12:04,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616998946] [2023-04-02 02:12:04,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:12:04,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:12:04,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:12:04,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:12:04,679 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:12:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:04,756 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-04-02 02:12:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:12:04,756 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-04-02 02:12:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:04,757 INFO L225 Difference]: With dead ends: 54 [2023-04-02 02:12:04,757 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 02:12:04,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:12:04,759 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:04,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:12:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 02:12:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-04-02 02:12:04,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 02:12:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2023-04-02 02:12:04,767 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2023-04-02 02:12:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:04,767 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2023-04-02 02:12:04,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:12:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2023-04-02 02:12:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 02:12:04,769 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:04,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:04,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 02:12:04,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 02:12:04,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:04,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:04,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2023-04-02 02:12:04,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:04,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269181178] [2023-04-02 02:12:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:04,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:04,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:04,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585106451] [2023-04-02 02:12:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:04,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:04,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:04,994 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) [2023-04-02 02:12:04,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 02:12:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:05,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:12:05,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:12:05,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:12:05,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:05,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269181178] [2023-04-02 02:12:05,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:05,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585106451] [2023-04-02 02:12:05,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585106451] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:12:05,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:12:05,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 02:12:05,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027883972] [2023-04-02 02:12:05,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:12:05,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 02:12:05,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 02:12:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:12:05,172 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:12:05,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:05,266 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-02 02:12:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:12:05,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2023-04-02 02:12:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:05,268 INFO L225 Difference]: With dead ends: 53 [2023-04-02 02:12:05,269 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 02:12:05,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:12:05,270 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:05,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 169 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:12:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 02:12:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-04-02 02:12:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 02:12:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2023-04-02 02:12:05,289 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2023-04-02 02:12:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:05,289 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2023-04-02 02:12:05,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:12:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2023-04-02 02:12:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 02:12:05,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:05,292 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:05,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 02:12:05,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:05,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:05,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:05,499 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2023-04-02 02:12:05,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:05,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917962849] [2023-04-02 02:12:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:05,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:05,515 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:05,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634812428] [2023-04-02 02:12:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:05,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:05,517 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) [2023-04-02 02:12:05,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 02:12:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:05,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:12:05,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:12:05,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:12:05,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917962849] [2023-04-02 02:12:05,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634812428] [2023-04-02 02:12:05,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634812428] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:05,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:05,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-04-02 02:12:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326796211] [2023-04-02 02:12:05,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:05,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 02:12:05,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:05,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 02:12:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:12:05,747 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:12:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:05,902 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2023-04-02 02:12:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 02:12:05,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-04-02 02:12:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:05,903 INFO L225 Difference]: With dead ends: 103 [2023-04-02 02:12:05,904 INFO L226 Difference]: Without dead ends: 96 [2023-04-02 02:12:05,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:12:05,904 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:05,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 205 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:12:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-02 02:12:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2023-04-02 02:12:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 02:12:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2023-04-02 02:12:05,923 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2023-04-02 02:12:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:05,924 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2023-04-02 02:12:05,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:12:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2023-04-02 02:12:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 02:12:05,925 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:05,925 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:05,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:06,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:06,130 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:06,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:06,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2023-04-02 02:12:06,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:06,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640189804] [2023-04-02 02:12:06,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:06,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:06,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:06,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812988024] [2023-04-02 02:12:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:06,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:06,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:06,143 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) [2023-04-02 02:12:06,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 02:12:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:06,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 02:12:06,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:12:06,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:06,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:06,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640189804] [2023-04-02 02:12:06,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:06,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812988024] [2023-04-02 02:12:06,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812988024] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:12:06,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:12:06,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-02 02:12:06,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732039266] [2023-04-02 02:12:06,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:06,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 02:12:06,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 02:12:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:12:06,459 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 02:12:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:06,577 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2023-04-02 02:12:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 02:12:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2023-04-02 02:12:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:06,583 INFO L225 Difference]: With dead ends: 79 [2023-04-02 02:12:06,583 INFO L226 Difference]: Without dead ends: 77 [2023-04-02 02:12:06,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-04-02 02:12:06,588 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:06,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 164 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:12:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-02 02:12:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2023-04-02 02:12:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 02:12:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2023-04-02 02:12:06,606 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2023-04-02 02:12:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:06,607 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2023-04-02 02:12:06,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 02:12:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2023-04-02 02:12:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 02:12:06,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:06,608 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:06,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:06,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:06,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2023-04-02 02:12:06,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:06,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959724015] [2023-04-02 02:12:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:06,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:06,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:06,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317808199] [2023-04-02 02:12:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:06,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:06,824 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) [2023-04-02 02:12:06,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 02:12:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:06,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 02:12:06,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:12:07,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:12:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959724015] [2023-04-02 02:12:07,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317808199] [2023-04-02 02:12:07,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317808199] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:07,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-04-02 02:12:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197898496] [2023-04-02 02:12:07,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:07,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 02:12:07,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 02:12:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:12:07,105 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:12:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:07,306 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2023-04-02 02:12:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:12:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-02 02:12:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:07,307 INFO L225 Difference]: With dead ends: 111 [2023-04-02 02:12:07,307 INFO L226 Difference]: Without dead ends: 109 [2023-04-02 02:12:07,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-04-02 02:12:07,308 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 44 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:07,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 320 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:12:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-02 02:12:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2023-04-02 02:12:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-02 02:12:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2023-04-02 02:12:07,341 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2023-04-02 02:12:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:07,342 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2023-04-02 02:12:07,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:12:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2023-04-02 02:12:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 02:12:07,344 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:07,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:07,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:07,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:07,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2023-04-02 02:12:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:07,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631061121] [2023-04-02 02:12:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:07,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:07,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:07,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404328699] [2023-04-02 02:12:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:07,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:07,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:07,594 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) [2023-04-02 02:12:07,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 02:12:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:07,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 02:12:07,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 02:12:07,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 02:12:08,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:08,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631061121] [2023-04-02 02:12:08,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:08,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404328699] [2023-04-02 02:12:08,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404328699] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:12:08,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:12:08,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-04-02 02:12:08,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334565277] [2023-04-02 02:12:08,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:12:08,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:12:08,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:08,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:12:08,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:12:08,864 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:12:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:08,919 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2023-04-02 02:12:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:12:08,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-04-02 02:12:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:08,920 INFO L225 Difference]: With dead ends: 151 [2023-04-02 02:12:08,920 INFO L226 Difference]: Without dead ends: 149 [2023-04-02 02:12:08,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-04-02 02:12:08,921 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:08,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:12:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-02 02:12:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2023-04-02 02:12:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-02 02:12:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2023-04-02 02:12:08,943 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2023-04-02 02:12:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:08,944 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2023-04-02 02:12:08,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:12:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2023-04-02 02:12:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 02:12:08,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:08,945 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:08,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 02:12:09,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:09,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:09,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2023-04-02 02:12:09,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135439770] [2023-04-02 02:12:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:09,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:09,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924342444] [2023-04-02 02:12:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:09,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:09,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:09,162 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) [2023-04-02 02:12:09,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 02:12:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:09,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 02:12:09,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:12:09,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:12:09,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135439770] [2023-04-02 02:12:09,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924342444] [2023-04-02 02:12:09,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924342444] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:09,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:09,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2023-04-02 02:12:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232881125] [2023-04-02 02:12:09,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:09,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 02:12:09,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:09,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 02:12:09,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:12:09,615 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 02:12:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:12,941 INFO L93 Difference]: Finished difference Result 186 states and 258 transitions. [2023-04-02 02:12:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 02:12:12,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2023-04-02 02:12:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:12,943 INFO L225 Difference]: With dead ends: 186 [2023-04-02 02:12:12,943 INFO L226 Difference]: Without dead ends: 184 [2023-04-02 02:12:12,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 02:12:12,944 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 134 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:12,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 223 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 02:12:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-02 02:12:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2023-04-02 02:12:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 112 states have (on average 1.2589285714285714) internal successors, (141), 116 states have internal predecessors, (141), 53 states have call successors, (53), 10 states have call predecessors, (53), 9 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2023-04-02 02:12:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 245 transitions. [2023-04-02 02:12:12,980 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 245 transitions. Word has length 47 [2023-04-02 02:12:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:12,980 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 245 transitions. [2023-04-02 02:12:12,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 02:12:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 245 transitions. [2023-04-02 02:12:12,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 02:12:12,981 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:12,981 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:12,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 02:12:13,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:13,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2023-04-02 02:12:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:13,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561141359] [2023-04-02 02:12:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:13,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:13,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28727898] [2023-04-02 02:12:13,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:12:13,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:13,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:13,205 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) [2023-04-02 02:12:13,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 02:12:13,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:12:13,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:12:13,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:12:13,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:12:13,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:12:13,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:13,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561141359] [2023-04-02 02:12:13,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:13,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28727898] [2023-04-02 02:12:13,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28727898] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:12:13,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:12:13,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:12:13,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922879240] [2023-04-02 02:12:13,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:12:13,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:12:13,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:13,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:12:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:12:13,271 INFO L87 Difference]: Start difference. First operand 175 states and 245 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:12:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:13,356 INFO L93 Difference]: Finished difference Result 221 states and 305 transitions. [2023-04-02 02:12:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:12:13,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2023-04-02 02:12:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:13,358 INFO L225 Difference]: With dead ends: 221 [2023-04-02 02:12:13,358 INFO L226 Difference]: Without dead ends: 140 [2023-04-02 02:12:13,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:12:13,362 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:13,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 151 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:12:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-04-02 02:12:13,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2023-04-02 02:12:13,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-04-02 02:12:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2023-04-02 02:12:13,388 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 47 [2023-04-02 02:12:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:13,388 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2023-04-02 02:12:13,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:12:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2023-04-02 02:12:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 02:12:13,390 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:13,390 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:13,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:13,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:13,595 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:13,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2023-04-02 02:12:13,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175185010] [2023-04-02 02:12:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:13,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:13,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862383077] [2023-04-02 02:12:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:13,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:13,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:13,626 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) [2023-04-02 02:12:13,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 02:12:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:13,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 02:12:13,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 02:12:13,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 02:12:13,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:13,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175185010] [2023-04-02 02:12:13,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:13,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862383077] [2023-04-02 02:12:13,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862383077] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:12:13,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:12:13,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-02 02:12:13,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770880987] [2023-04-02 02:12:13,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:12:13,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:12:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:12:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:12:13,772 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 02:12:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:13,835 INFO L93 Difference]: Finished difference Result 123 states and 158 transitions. [2023-04-02 02:12:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:12:13,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2023-04-02 02:12:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:13,836 INFO L225 Difference]: With dead ends: 123 [2023-04-02 02:12:13,836 INFO L226 Difference]: Without dead ends: 121 [2023-04-02 02:12:13,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:12:13,837 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:13,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 138 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:12:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-02 02:12:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-04-02 02:12:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 78 states have internal predecessors, (88), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-04-02 02:12:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 156 transitions. [2023-04-02 02:12:13,868 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 156 transitions. Word has length 52 [2023-04-02 02:12:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:13,869 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 156 transitions. [2023-04-02 02:12:13,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 02:12:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 156 transitions. [2023-04-02 02:12:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 02:12:13,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:13,869 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:13,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:14,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 02:12:14,074 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:14,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:14,074 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2023-04-02 02:12:14,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:14,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908634764] [2023-04-02 02:12:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:14,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:14,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546305237] [2023-04-02 02:12:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:14,083 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) [2023-04-02 02:12:14,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 02:12:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:14,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-02 02:12:14,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 02:12:14,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-02 02:12:15,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908634764] [2023-04-02 02:12:15,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:15,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546305237] [2023-04-02 02:12:15,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546305237] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:15,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:15,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-04-02 02:12:15,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769160333] [2023-04-02 02:12:15,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:15,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 02:12:15,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:15,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 02:12:15,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-04-02 02:12:15,403 INFO L87 Difference]: Start difference. First operand 121 states and 156 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-02 02:12:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:25,858 INFO L93 Difference]: Finished difference Result 341 states and 472 transitions. [2023-04-02 02:12:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 02:12:25,859 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 64 [2023-04-02 02:12:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:25,860 INFO L225 Difference]: With dead ends: 341 [2023-04-02 02:12:25,860 INFO L226 Difference]: Without dead ends: 253 [2023-04-02 02:12:25,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 02:12:25,863 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:25,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 312 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 02:12:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-04-02 02:12:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2023-04-02 02:12:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 139 states have internal predecessors, (161), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-04-02 02:12:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 277 transitions. [2023-04-02 02:12:25,968 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 277 transitions. Word has length 64 [2023-04-02 02:12:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:25,969 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 277 transitions. [2023-04-02 02:12:25,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-02 02:12:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 277 transitions. [2023-04-02 02:12:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 02:12:25,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:25,969 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:25,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:26,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 02:12:26,170 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:26,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2023-04-02 02:12:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:26,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510741028] [2023-04-02 02:12:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:26,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:26,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513705657] [2023-04-02 02:12:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:26,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:26,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:26,190 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) [2023-04-02 02:12:26,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 02:12:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:26,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-02 02:12:26,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 02:12:26,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-02 02:12:26,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:26,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510741028] [2023-04-02 02:12:26,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:26,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513705657] [2023-04-02 02:12:26,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513705657] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:26,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:26,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-04-02 02:12:26,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022342985] [2023-04-02 02:12:26,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 02:12:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 02:12:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-04-02 02:12:26,956 INFO L87 Difference]: Start difference. First operand 210 states and 277 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-04-02 02:12:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:35,379 INFO L93 Difference]: Finished difference Result 316 states and 426 transitions. [2023-04-02 02:12:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 02:12:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 72 [2023-04-02 02:12:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:35,382 INFO L225 Difference]: With dead ends: 316 [2023-04-02 02:12:35,383 INFO L226 Difference]: Without dead ends: 261 [2023-04-02 02:12:35,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 02:12:35,384 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 99 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:35,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 353 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 02:12:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-04-02 02:12:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2023-04-02 02:12:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 143 states have (on average 1.1818181818181819) internal successors, (169), 145 states have internal predecessors, (169), 61 states have call successors, (61), 16 states have call predecessors, (61), 15 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2023-04-02 02:12:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 289 transitions. [2023-04-02 02:12:35,465 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 289 transitions. Word has length 72 [2023-04-02 02:12:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:35,465 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 289 transitions. [2023-04-02 02:12:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-04-02 02:12:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 289 transitions. [2023-04-02 02:12:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 02:12:35,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:35,466 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:35,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:35,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 02:12:35,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:35,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 2 times [2023-04-02 02:12:35,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:35,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229780503] [2023-04-02 02:12:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:35,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:35,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585515572] [2023-04-02 02:12:35,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:12:35,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:35,686 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:12:35,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 02:12:35,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:12:35,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:12:35,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 65 conjunts are in the unsatisfiable core [2023-04-02 02:12:35,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 02:12:36,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-02 02:12:37,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229780503] [2023-04-02 02:12:37,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585515572] [2023-04-02 02:12:37,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585515572] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:37,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:37,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2023-04-02 02:12:37,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641089301] [2023-04-02 02:12:37,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:37,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 02:12:37,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:37,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 02:12:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-04-02 02:12:37,338 INFO L87 Difference]: Start difference. First operand 220 states and 289 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-04-02 02:12:50,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:12:55,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:12:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:57,494 INFO L93 Difference]: Finished difference Result 380 states and 521 transitions. [2023-04-02 02:12:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 02:12:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 77 [2023-04-02 02:12:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:57,496 INFO L225 Difference]: With dead ends: 380 [2023-04-02 02:12:57,497 INFO L226 Difference]: Without dead ends: 378 [2023-04-02 02:12:57,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=589, Invalid=2491, Unknown=0, NotChecked=0, Total=3080 [2023-04-02 02:12:57,498 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 248 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 216 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:57,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 352 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 944 Invalid, 2 Unknown, 0 Unchecked, 11.8s Time] [2023-04-02 02:12:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-04-02 02:12:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2023-04-02 02:12:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 207 states have (on average 1.2077294685990339) internal successors, (250), 209 states have internal predecessors, (250), 97 states have call successors, (97), 21 states have call predecessors, (97), 20 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-04-02 02:12:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 442 transitions. [2023-04-02 02:12:57,664 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 442 transitions. Word has length 77 [2023-04-02 02:12:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:57,664 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 442 transitions. [2023-04-02 02:12:57,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-04-02 02:12:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 442 transitions. [2023-04-02 02:12:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-02 02:12:57,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:57,665 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:57,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:57,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 02:12:57,869 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:57,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:57,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 1 times [2023-04-02 02:12:57,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:57,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299842826] [2023-04-02 02:12:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:57,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:57,878 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:57,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263235881] [2023-04-02 02:12:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:57,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:57,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:57,880 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:12:57,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 02:12:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:57,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 82 conjunts are in the unsatisfiable core [2023-04-02 02:12:57,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-04-02 02:12:58,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:13:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-02 02:13:02,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:13:02,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299842826] [2023-04-02 02:13:02,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:13:02,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263235881] [2023-04-02 02:13:02,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263235881] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:13:02,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:13:02,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-04-02 02:13:02,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031046379] [2023-04-02 02:13:02,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:13:02,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 02:13:02,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:13:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 02:13:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 02:13:02,816 INFO L87 Difference]: Start difference. First operand 325 states and 442 transitions. Second operand has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 9 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2023-04-02 02:13:13,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:13:18,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:13:23,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:13:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:13:43,200 INFO L93 Difference]: Finished difference Result 529 states and 752 transitions. [2023-04-02 02:13:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-04-02 02:13:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 9 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 91 [2023-04-02 02:13:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:13:43,208 INFO L225 Difference]: With dead ends: 529 [2023-04-02 02:13:43,208 INFO L226 Difference]: Without dead ends: 521 [2023-04-02 02:13:43,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2329 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=1499, Invalid=6873, Unknown=0, NotChecked=0, Total=8372 [2023-04-02 02:13:43,210 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 299 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 277 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 2228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2023-04-02 02:13:43,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 538 Invalid, 2228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1948 Invalid, 3 Unknown, 0 Unchecked, 20.6s Time] [2023-04-02 02:13:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-04-02 02:13:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 464. [2023-04-02 02:13:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 292 states have (on average 1.2226027397260273) internal successors, (357), 295 states have internal predecessors, (357), 147 states have call successors, (147), 25 states have call predecessors, (147), 24 states have return successors, (145), 143 states have call predecessors, (145), 145 states have call successors, (145) [2023-04-02 02:13:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 649 transitions. [2023-04-02 02:13:43,595 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 649 transitions. Word has length 91 [2023-04-02 02:13:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:13:43,595 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 649 transitions. [2023-04-02 02:13:43,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 9 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2023-04-02 02:13:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 649 transitions. [2023-04-02 02:13:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 02:13:43,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:13:43,597 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:13:43,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-04-02 02:13:43,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:13:43,802 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:13:43,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:13:43,802 INFO L85 PathProgramCache]: Analyzing trace with hash -568526404, now seen corresponding path program 2 times [2023-04-02 02:13:43,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:13:43,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219745583] [2023-04-02 02:13:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:13:43,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:13:43,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:13:43,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69692475] [2023-04-02 02:13:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:13:43,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:13:43,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:13:43,810 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:13:43,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 02:13:43,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:13:43,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:13:43,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 02:13:43,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:13:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-02 02:13:43,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:13:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-02 02:13:44,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:13:44,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219745583] [2023-04-02 02:13:44,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:13:44,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69692475] [2023-04-02 02:13:44,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69692475] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:13:44,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:13:44,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-04-02 02:13:44,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089472034] [2023-04-02 02:13:44,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:13:44,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 02:13:44,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:13:44,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 02:13:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:13:44,015 INFO L87 Difference]: Start difference. First operand 464 states and 649 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-02 02:13:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:13:44,922 INFO L93 Difference]: Finished difference Result 911 states and 1302 transitions. [2023-04-02 02:13:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 02:13:44,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2023-04-02 02:13:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:13:44,925 INFO L225 Difference]: With dead ends: 911 [2023-04-02 02:13:44,925 INFO L226 Difference]: Without dead ends: 617 [2023-04-02 02:13:44,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 188 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-04-02 02:13:44,926 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 77 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:13:44,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 333 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:13:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-02 02:13:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 460. [2023-04-02 02:13:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 276 states have (on average 1.213768115942029) internal successors, (335), 277 states have internal predecessors, (335), 159 states have call successors, (159), 25 states have call predecessors, (159), 24 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2023-04-02 02:13:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 651 transitions. [2023-04-02 02:13:45,291 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 651 transitions. Word has length 99 [2023-04-02 02:13:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:13:45,291 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 651 transitions. [2023-04-02 02:13:45,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-02 02:13:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 651 transitions. [2023-04-02 02:13:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 02:13:45,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:13:45,293 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:13:45,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 02:13:45,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 02:13:45,498 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:13:45,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:13:45,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 2 times [2023-04-02 02:13:45,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:13:45,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402147358] [2023-04-02 02:13:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:13:45,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:13:45,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:13:45,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699372208] [2023-04-02 02:13:45,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:13:45,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:13:45,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:13:45,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:13:45,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 02:13:45,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:13:45,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:13:45,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 72 conjunts are in the unsatisfiable core [2023-04-02 02:13:45,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:13:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-04-02 02:13:46,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:13:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-04-02 02:13:50,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:13:50,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402147358] [2023-04-02 02:13:50,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:13:50,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699372208] [2023-04-02 02:13:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699372208] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:13:50,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:13:50,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-04-02 02:13:50,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061944055] [2023-04-02 02:13:50,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:13:50,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 02:13:50,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:13:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 02:13:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-04-02 02:13:50,231 INFO L87 Difference]: Start difference. First operand 460 states and 651 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) [2023-04-02 02:15:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:15:04,661 INFO L93 Difference]: Finished difference Result 886 states and 1273 transitions. [2023-04-02 02:15:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-04-02 02:15:04,662 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) Word has length 111 [2023-04-02 02:15:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:15:04,665 INFO L225 Difference]: With dead ends: 886 [2023-04-02 02:15:04,665 INFO L226 Difference]: Without dead ends: 698 [2023-04-02 02:15:04,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2456 ImplicationChecksByTransitivity, 57.4s TimeCoverageRelationStatistics Valid=1604, Invalid=7138, Unknown=0, NotChecked=0, Total=8742 [2023-04-02 02:15:04,668 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 250 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2023-04-02 02:15:04,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 517 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2023-04-02 02:15:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2023-04-02 02:15:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 626. [2023-04-02 02:15:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 370 states have (on average 1.218918918918919) internal successors, (451), 371 states have internal predecessors, (451), 227 states have call successors, (227), 29 states have call predecessors, (227), 28 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2023-04-02 02:15:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2023-04-02 02:15:05,330 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 111 [2023-04-02 02:15:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:15:05,332 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2023-04-02 02:15:05,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) [2023-04-02 02:15:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2023-04-02 02:15:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-02 02:15:05,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:15:05,336 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:15:05,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 02:15:05,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 02:15:05,541 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:15:05,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:15:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1377622511, now seen corresponding path program 1 times [2023-04-02 02:15:05,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:15:05,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709380386] [2023-04-02 02:15:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:15:05,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:15:05,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:15:05,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789752563] [2023-04-02 02:15:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:15:05,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:15:05,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:15:05,550 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:15:05,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 02:15:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:15:05,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-02 02:15:05,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:15:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-04-02 02:15:05,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:15:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-04-02 02:15:06,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:15:06,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709380386] [2023-04-02 02:15:06,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:15:06,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789752563] [2023-04-02 02:15:06,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789752563] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:15:06,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:15:06,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-04-02 02:15:06,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233890156] [2023-04-02 02:15:06,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:15:06,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 02:15:06,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:15:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 02:15:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-04-02 02:15:06,403 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 19 states have internal predecessors, (55), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2023-04-02 02:15:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:15:09,853 INFO L93 Difference]: Finished difference Result 1478 states and 2235 transitions. [2023-04-02 02:15:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 02:15:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 19 states have internal predecessors, (55), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2023-04-02 02:15:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:15:09,857 INFO L225 Difference]: With dead ends: 1478 [2023-04-02 02:15:09,858 INFO L226 Difference]: Without dead ends: 1169 [2023-04-02 02:15:09,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 02:15:09,859 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 165 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:15:09,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 412 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 02:15:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2023-04-02 02:15:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1087. [2023-04-02 02:15:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 558 states have (on average 1.2741935483870968) internal successors, (711), 563 states have internal predecessors, (711), 494 states have call successors, (494), 35 states have call predecessors, (494), 34 states have return successors, (492), 488 states have call predecessors, (492), 492 states have call successors, (492) [2023-04-02 02:15:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1697 transitions. [2023-04-02 02:15:11,296 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1697 transitions. Word has length 124 [2023-04-02 02:15:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:15:11,296 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1697 transitions. [2023-04-02 02:15:11,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 19 states have internal predecessors, (55), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2023-04-02 02:15:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1697 transitions. [2023-04-02 02:15:11,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-02 02:15:11,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:15:11,298 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:15:11,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 02:15:11,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 02:15:11,504 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:15:11,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:15:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash 65157230, now seen corresponding path program 2 times [2023-04-02 02:15:11,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:15:11,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163795972] [2023-04-02 02:15:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:15:11,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:15:11,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:15:11,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286233152] [2023-04-02 02:15:11,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:15:11,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:15:11,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:15:11,520 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:15:11,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 02:15:11,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:15:11,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:15:11,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 77 conjunts are in the unsatisfiable core [2023-04-02 02:15:11,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:15:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 32 proven. 58 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-04-02 02:15:12,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:15:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 26 proven. 55 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-04-02 02:15:15,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:15:15,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163795972] [2023-04-02 02:15:15,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:15:15,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286233152] [2023-04-02 02:15:15,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286233152] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:15:15,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:15:15,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2023-04-02 02:15:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042380364] [2023-04-02 02:15:15,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:15:15,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 02:15:15,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:15:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 02:15:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 02:15:15,639 INFO L87 Difference]: Start difference. First operand 1087 states and 1697 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 30 states have internal predecessors, (74), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2023-04-02 02:15:25,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:15:27,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:15:29,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:15:32,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:15:34,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:15:48,554 WARN L223 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 84 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:16:03,470 WARN L223 SmtUtils]: Spent 11.59s on a formula simplification. DAG size of input: 100 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:16:06,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:16:30,969 WARN L223 SmtUtils]: Spent 11.23s on a formula simplification. DAG size of input: 99 DAG size of output: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:16:38,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:16:40,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []