./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 946e199240c0e980bd422384e40e4d2247ef6b3560471b18ba5a354c3628dba9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:30:00,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:30:00,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:30:00,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:30:00,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:30:00,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:30:00,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:30:00,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:30:00,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:30:00,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:30:00,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:30:00,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:30:00,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:30:00,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:30:00,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:30:00,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:30:00,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:30:00,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:30:00,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:30:00,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:30:00,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:30:00,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:30:00,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:30:00,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:30:00,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:30:00,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:30:00,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:30:00,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:30:00,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:30:00,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:30:00,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:30:00,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:30:00,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:30:00,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:30:00,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:30:00,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:30:00,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:30:00,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:30:00,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:30:00,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:30:00,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:30:00,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 02:30:00,840 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:30:00,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:30:00,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:30:00,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:30:00,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:30:00,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:30:00,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:30:00,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:30:00,842 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:30:00,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:30:00,843 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:30:00,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:30:00,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:30:00,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:30:00,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 02:30:00,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:30:00,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 02:30:00,844 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:30:00,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 02:30:00,844 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:30:00,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 02:30:00,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:30:00,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:30:00,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:30:00,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:30:00,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:30:00,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:30:00,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 02:30:00,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:30:00,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:30:00,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:30:00,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 02:30:00,846 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:30:00,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:30:00,847 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:30:00,847 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 946e199240c0e980bd422384e40e4d2247ef6b3560471b18ba5a354c3628dba9 [2023-02-17 02:30:01,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:30:01,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:30:01,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:30:01,037 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:30:01,037 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:30:01,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2023-02-17 02:30:02,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:30:02,228 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:30:02,230 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2023-02-17 02:30:02,237 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86570a672/48a926726a7f4737974494be745a6c97/FLAG3417cb92d [2023-02-17 02:30:02,247 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86570a672/48a926726a7f4737974494be745a6c97 [2023-02-17 02:30:02,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:30:02,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:30:02,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:30:02,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:30:02,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:30:02,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c851638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02, skipping insertion in model container [2023-02-17 02:30:02,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:30:02,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:30:02,355 WARN L237 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/ps6-ll_unwindbound20.c[458,471] [2023-02-17 02:30:02,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:30:02,380 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:30:02,390 WARN L237 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/ps6-ll_unwindbound20.c[458,471] [2023-02-17 02:30:02,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:30:02,410 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:30:02,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02 WrapperNode [2023-02-17 02:30:02,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:30:02,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:30:02,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:30:02,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:30:02,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,440 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2023-02-17 02:30:02,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:30:02,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:30:02,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:30:02,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:30:02,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,463 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:30:02,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:30:02,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:30:02,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:30:02,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (1/1) ... [2023-02-17 02:30:02,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:30:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:02,486 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) [2023-02-17 02:30:02,487 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 [2023-02-17 02:30:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:30:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:30:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:30:02,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:30:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 02:30:02,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 02:30:02,566 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:30:02,568 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:30:02,699 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:30:02,705 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:30:02,705 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 02:30:02,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:30:02 BoogieIcfgContainer [2023-02-17 02:30:02,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:30:02,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:30:02,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:30:02,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:30:02,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:30:02" (1/3) ... [2023-02-17 02:30:02,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2ba375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:30:02, skipping insertion in model container [2023-02-17 02:30:02,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:30:02" (2/3) ... [2023-02-17 02:30:02,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2ba375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:30:02, skipping insertion in model container [2023-02-17 02:30:02,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:30:02" (3/3) ... [2023-02-17 02:30:02,730 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound20.c [2023-02-17 02:30:02,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:30:02,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 02:30:02,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:30:02,853 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;@471a6ba8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:30:02,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 02:30:02,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:30:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 02:30:02,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:02,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:02,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2023-02-17 02:30:02,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:02,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958625760] [2023-02-17 02:30:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:02,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:02,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:02,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958625760] [2023-02-17 02:30:02,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 02:30:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468300817] [2023-02-17 02:30:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:02,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:02,991 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) [2023-02-17 02:30:03,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:30:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:03,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 02:30:03,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:30:03,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:30:03,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468300817] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:30:03,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:30:03,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:30:03,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400009717] [2023-02-17 02:30:03,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:30:03,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 02:30:03,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 02:30:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:30:03,109 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:30:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:03,122 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2023-02-17 02:30:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 02:30:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 02:30:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:03,128 INFO L225 Difference]: With dead ends: 37 [2023-02-17 02:30:03,128 INFO L226 Difference]: Without dead ends: 16 [2023-02-17 02:30:03,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:30:03,133 INFO L413 NwaCegarLoop]: 23 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, 23 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 [2023-02-17 02:30:03,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:30:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-17 02:30:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-17 02:30:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:30:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-02-17 02:30:03,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2023-02-17 02:30:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:03,165 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-02-17 02:30:03,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:30:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-02-17 02:30:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 02:30:03,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:03,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:03,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 02:30:03,366 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 [2023-02-17 02:30:03,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:03,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2023-02-17 02:30:03,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:03,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493581571] [2023-02-17 02:30:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:03,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:03,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:03,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493581571] [2023-02-17 02:30:03,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 02:30:03,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665656614] [2023-02-17 02:30:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:03,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:03,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:03,393 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) [2023-02-17 02:30:03,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 02:30:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 02:30:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:30:03,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:30:03,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665656614] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:30:03,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:30:03,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:30:03,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529386960] [2023-02-17 02:30:03,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:30:03,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:30:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:03,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:30:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:30:03,468 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:30:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:03,478 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-17 02:30:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:30:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 02:30:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:03,479 INFO L225 Difference]: With dead ends: 26 [2023-02-17 02:30:03,479 INFO L226 Difference]: Without dead ends: 18 [2023-02-17 02:30:03,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:30:03,480 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:03,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:30:03,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-17 02:30:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-17 02:30:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:30:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-02-17 02:30:03,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2023-02-17 02:30:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:03,484 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-02-17 02:30:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:30:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-02-17 02:30:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 02:30:03,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:03,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:03,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 02:30:03,689 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 [2023-02-17 02:30:03,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:03,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2023-02-17 02:30:03,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:03,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083222019] [2023-02-17 02:30:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:03,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:03,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:03,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953297040] [2023-02-17 02:30:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:03,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:03,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:03,709 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) [2023-02-17 02:30:03,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 02:30:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:03,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 02:30:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:30:03,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:30:03,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083222019] [2023-02-17 02:30:03,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953297040] [2023-02-17 02:30:03,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953297040] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:30:03,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:30:03,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 02:30:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904765827] [2023-02-17 02:30:03,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:30:03,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:30:03,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:30:03,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:30:03,767 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:30:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:03,977 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-02-17 02:30:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:30:03,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 02:30:03,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:03,977 INFO L225 Difference]: With dead ends: 28 [2023-02-17 02:30:03,978 INFO L226 Difference]: Without dead ends: 24 [2023-02-17 02:30:03,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:30:03,979 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:03,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:30:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-17 02:30:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-17 02:30:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:30:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-17 02:30:03,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2023-02-17 02:30:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:03,984 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-17 02:30:03,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:30:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-17 02:30:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 02:30:03,985 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:03,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:04,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 02:30:04,190 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 [2023-02-17 02:30:04,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:04,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:04,191 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2023-02-17 02:30:04,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:04,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97509862] [2023-02-17 02:30:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:04,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:04,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:04,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189037407] [2023-02-17 02:30:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:04,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:04,215 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) [2023-02-17 02:30:04,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 02:30:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 02:30:04,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:30:04,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:30:04,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97509862] [2023-02-17 02:30:04,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189037407] [2023-02-17 02:30:04,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189037407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:30:04,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:30:04,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-17 02:30:04,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074114552] [2023-02-17 02:30:04,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:04,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 02:30:04,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:04,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 02:30:04,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:30:04,309 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:30:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:04,499 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-02-17 02:30:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 02:30:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-17 02:30:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:04,501 INFO L225 Difference]: With dead ends: 58 [2023-02-17 02:30:04,501 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 02:30:04,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:30:04,503 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:04,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 96 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:30:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 02:30:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-17 02:30:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 02:30:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-02-17 02:30:04,510 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2023-02-17 02:30:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:04,510 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-02-17 02:30:04,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:30:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-02-17 02:30:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 02:30:04,511 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:04,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:04,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 02:30:04,716 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 [2023-02-17 02:30:04,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2023-02-17 02:30:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274845758] [2023-02-17 02:30:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:04,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:04,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984613045] [2023-02-17 02:30:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:04,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:04,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:04,726 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) [2023-02-17 02:30:04,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 02:30:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 02:30:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:30:04,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:30:04,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:04,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274845758] [2023-02-17 02:30:04,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:04,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984613045] [2023-02-17 02:30:04,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984613045] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:30:04,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:30:04,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-17 02:30:04,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744862648] [2023-02-17 02:30:04,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:04,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 02:30:04,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 02:30:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:30:04,862 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:30:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:04,966 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2023-02-17 02:30:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 02:30:04,966 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-17 02:30:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:04,967 INFO L225 Difference]: With dead ends: 60 [2023-02-17 02:30:04,967 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 02:30:04,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-17 02:30:04,968 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:04,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 83 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:30:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 02:30:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-02-17 02:30:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 02:30:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-02-17 02:30:04,978 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2023-02-17 02:30:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:04,978 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-02-17 02:30:04,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 02:30:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-02-17 02:30:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 02:30:04,979 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:04,979 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:04,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 02:30:05,186 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 [2023-02-17 02:30:05,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:05,187 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2023-02-17 02:30:05,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:05,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30256193] [2023-02-17 02:30:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:05,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:05,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:05,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195300028] [2023-02-17 02:30:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:05,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:05,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:05,196 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) [2023-02-17 02:30:05,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 02:30:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:05,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 02:30:05,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 02:30:05,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:05,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:05,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30256193] [2023-02-17 02:30:05,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:05,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195300028] [2023-02-17 02:30:05,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195300028] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:30:05,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:30:05,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-17 02:30:05,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356183220] [2023-02-17 02:30:05,548 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:05,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:30:05,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:30:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:30:05,549 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:30:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:05,678 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-02-17 02:30:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 02:30:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-02-17 02:30:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:05,680 INFO L225 Difference]: With dead ends: 51 [2023-02-17 02:30:05,680 INFO L226 Difference]: Without dead ends: 45 [2023-02-17 02:30:05,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-02-17 02:30:05,681 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:05,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 78 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:30:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-17 02:30:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-02-17 02:30:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 02:30:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-02-17 02:30:05,691 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2023-02-17 02:30:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:05,691 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-02-17 02:30:05,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 02:30:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-02-17 02:30:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 02:30:05,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:05,692 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:05,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 02:30:05,921 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 [2023-02-17 02:30:05,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:05,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:05,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2023-02-17 02:30:05,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:05,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707739572] [2023-02-17 02:30:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:05,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:05,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:05,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703788764] [2023-02-17 02:30:05,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:30:05,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:05,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:05,933 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) [2023-02-17 02:30:05,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 02:30:05,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:30:05,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:30:05,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 02:30:05,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 02:30:06,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 02:30:06,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707739572] [2023-02-17 02:30:06,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703788764] [2023-02-17 02:30:06,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703788764] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:30:06,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:30:06,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-02-17 02:30:06,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686948894] [2023-02-17 02:30:06,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 02:30:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 02:30:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:30:06,096 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:30:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:06,336 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2023-02-17 02:30:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 02:30:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37 [2023-02-17 02:30:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:06,337 INFO L225 Difference]: With dead ends: 62 [2023-02-17 02:30:06,337 INFO L226 Difference]: Without dead ends: 54 [2023-02-17 02:30:06,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2023-02-17 02:30:06,338 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:06,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 169 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:30:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-17 02:30:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2023-02-17 02:30:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 02:30:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-02-17 02:30:06,347 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2023-02-17 02:30:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:06,348 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-02-17 02:30:06,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:30:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-02-17 02:30:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 02:30:06,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:06,349 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:06,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 02:30:06,555 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 [2023-02-17 02:30:06,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2023-02-17 02:30:06,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:06,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932842017] [2023-02-17 02:30:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:06,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:06,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:06,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290058972] [2023-02-17 02:30:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:06,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:06,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:06,564 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) [2023-02-17 02:30:06,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 02:30:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 02:30:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 02:30:06,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 02:30:06,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:06,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932842017] [2023-02-17 02:30:06,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:06,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290058972] [2023-02-17 02:30:06,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290058972] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:30:06,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:30:06,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-17 02:30:06,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121240405] [2023-02-17 02:30:06,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:06,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 02:30:06,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:06,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 02:30:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 02:30:06,677 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-17 02:30:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:06,812 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2023-02-17 02:30:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 02:30:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2023-02-17 02:30:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:06,816 INFO L225 Difference]: With dead ends: 126 [2023-02-17 02:30:06,816 INFO L226 Difference]: Without dead ends: 116 [2023-02-17 02:30:06,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-17 02:30:06,817 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:06,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 128 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:30:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-17 02:30:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2023-02-17 02:30:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-17 02:30:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2023-02-17 02:30:06,840 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 47 [2023-02-17 02:30:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:06,840 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2023-02-17 02:30:06,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-17 02:30:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2023-02-17 02:30:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-17 02:30:06,841 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:06,841 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:06,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-17 02:30:07,048 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 [2023-02-17 02:30:07,049 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:07,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 3 times [2023-02-17 02:30:07,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:07,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924667653] [2023-02-17 02:30:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:07,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:07,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:07,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484550315] [2023-02-17 02:30:07,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 02:30:07,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:07,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:07,071 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) [2023-02-17 02:30:07,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 02:30:18,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 02:30:18,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:30:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 02:30:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 19 proven. 73 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-17 02:30:19,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:19,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924667653] [2023-02-17 02:30:19,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484550315] [2023-02-17 02:30:19,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484550315] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:30:19,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:30:19,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-17 02:30:19,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443502282] [2023-02-17 02:30:19,140 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 02:30:19,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 02:30:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-02-17 02:30:19,141 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 02:30:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:19,330 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2023-02-17 02:30:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 02:30:19,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2023-02-17 02:30:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:19,332 INFO L225 Difference]: With dead ends: 101 [2023-02-17 02:30:19,332 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 02:30:19,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-02-17 02:30:19,332 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:19,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 197 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:30:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 02:30:19,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-02-17 02:30:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 02:30:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-02-17 02:30:19,353 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2023-02-17 02:30:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:19,354 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-02-17 02:30:19,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 02:30:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-02-17 02:30:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 02:30:19,356 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:19,356 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:19,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 02:30:19,556 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 [2023-02-17 02:30:19,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 4 times [2023-02-17 02:30:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:19,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690392419] [2023-02-17 02:30:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:19,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:19,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:19,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500829378] [2023-02-17 02:30:19,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 02:30:19,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:19,567 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) [2023-02-17 02:30:19,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 02:30:19,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 02:30:19,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:30:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 02:30:19,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-17 02:30:19,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:19,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:19,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690392419] [2023-02-17 02:30:19,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:19,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500829378] [2023-02-17 02:30:19,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500829378] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:30:19,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:30:19,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-17 02:30:19,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506401118] [2023-02-17 02:30:19,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:19,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 02:30:19,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 02:30:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-02-17 02:30:19,742 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:30:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:19,906 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2023-02-17 02:30:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 02:30:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2023-02-17 02:30:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:19,907 INFO L225 Difference]: With dead ends: 100 [2023-02-17 02:30:19,907 INFO L226 Difference]: Without dead ends: 94 [2023-02-17 02:30:19,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-17 02:30:19,908 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:19,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 285 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:30:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-17 02:30:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-02-17 02:30:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 02:30:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2023-02-17 02:30:19,921 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2023-02-17 02:30:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:19,922 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2023-02-17 02:30:19,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 02:30:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2023-02-17 02:30:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-17 02:30:19,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:19,926 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:19,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 02:30:20,130 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 [2023-02-17 02:30:20,130 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 5 times [2023-02-17 02:30:20,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:20,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75203721] [2023-02-17 02:30:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:20,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:20,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:20,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481868162] [2023-02-17 02:30:20,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 02:30:20,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:20,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:20,140 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) [2023-02-17 02:30:20,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 02:30:20,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-17 02:30:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:30:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 02:30:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 23 proven. 131 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-17 02:30:20,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:20,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:20,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75203721] [2023-02-17 02:30:20,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:20,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481868162] [2023-02-17 02:30:20,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481868162] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:30:20,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:30:20,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 02:30:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855954610] [2023-02-17 02:30:20,834 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:20,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 02:30:20,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 02:30:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-02-17 02:30:20,835 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 02:30:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:21,083 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2023-02-17 02:30:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 02:30:21,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2023-02-17 02:30:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:21,085 INFO L225 Difference]: With dead ends: 99 [2023-02-17 02:30:21,085 INFO L226 Difference]: Without dead ends: 93 [2023-02-17 02:30:21,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-02-17 02:30:21,086 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:21,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 305 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:30:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-17 02:30:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-02-17 02:30:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 02:30:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2023-02-17 02:30:21,105 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2023-02-17 02:30:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:21,106 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2023-02-17 02:30:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 02:30:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2023-02-17 02:30:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-17 02:30:21,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:21,108 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:21,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 02:30:21,313 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 [2023-02-17 02:30:21,313 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 6 times [2023-02-17 02:30:21,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:21,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110682062] [2023-02-17 02:30:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:21,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:21,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:21,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877943471] [2023-02-17 02:30:21,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 02:30:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:21,336 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) [2023-02-17 02:30:21,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 02:30:21,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-17 02:30:21,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:30:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-17 02:30:21,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-17 02:30:21,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-17 02:30:21,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:21,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110682062] [2023-02-17 02:30:21,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:21,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877943471] [2023-02-17 02:30:21,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877943471] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:30:21,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:30:21,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2023-02-17 02:30:21,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028035919] [2023-02-17 02:30:21,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:21,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 02:30:21,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:21,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 02:30:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-02-17 02:30:21,968 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-17 02:30:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:23,032 INFO L93 Difference]: Finished difference Result 146 states and 181 transitions. [2023-02-17 02:30:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 02:30:23,033 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 85 [2023-02-17 02:30:23,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:23,034 INFO L225 Difference]: With dead ends: 146 [2023-02-17 02:30:23,034 INFO L226 Difference]: Without dead ends: 138 [2023-02-17 02:30:23,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=533, Invalid=1917, Unknown=0, NotChecked=0, Total=2450 [2023-02-17 02:30:23,035 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 187 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:23,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 456 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 02:30:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-17 02:30:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2023-02-17 02:30:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-17 02:30:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2023-02-17 02:30:23,052 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 85 [2023-02-17 02:30:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:23,053 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2023-02-17 02:30:23,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-17 02:30:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2023-02-17 02:30:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-17 02:30:23,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:23,053 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:23,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 02:30:23,259 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 [2023-02-17 02:30:23,259 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:23,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1956819211, now seen corresponding path program 2 times [2023-02-17 02:30:23,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:23,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149140753] [2023-02-17 02:30:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:23,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:23,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:23,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951355879] [2023-02-17 02:30:23,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:30:23,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:23,268 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) [2023-02-17 02:30:23,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 02:30:23,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:30:23,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:30:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 02:30:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 02:30:23,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-17 02:30:23,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:30:23,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149140753] [2023-02-17 02:30:23,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:30:23,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951355879] [2023-02-17 02:30:23,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951355879] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:30:23,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:30:23,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-02-17 02:30:23,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638966819] [2023-02-17 02:30:23,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:30:23,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 02:30:23,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:30:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 02:30:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-17 02:30:23,500 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 20 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-17 02:30:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:30:23,776 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2023-02-17 02:30:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 02:30:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 20 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 95 [2023-02-17 02:30:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:30:23,778 INFO L225 Difference]: With dead ends: 194 [2023-02-17 02:30:23,778 INFO L226 Difference]: Without dead ends: 184 [2023-02-17 02:30:23,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 02:30:23,779 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 69 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:30:23,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 190 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:30:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-02-17 02:30:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 174. [2023-02-17 02:30:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 131 states have internal predecessors, (133), 24 states have call successors, (24), 21 states have call predecessors, (24), 20 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-17 02:30:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2023-02-17 02:30:23,800 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 95 [2023-02-17 02:30:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:30:23,801 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2023-02-17 02:30:23,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 20 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-17 02:30:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2023-02-17 02:30:23,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-17 02:30:23,802 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:30:23,802 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:30:23,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 02:30:24,006 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 [2023-02-17 02:30:24,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:30:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:30:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1626103872, now seen corresponding path program 7 times [2023-02-17 02:30:24,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:30:24,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367134187] [2023-02-17 02:30:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:30:24,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:30:24,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:30:24,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338553812] [2023-02-17 02:30:24,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 02:30:24,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:30:24,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:30:24,017 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) [2023-02-17 02:30:24,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 02:30:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:30:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-17 02:30:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:30:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 132 proven. 620 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2023-02-17 02:30:29,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:30:42,780 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) (.cse8 (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (let ((.cse0 (* 10 .cse1 .cse1 .cse1)) (.cse3 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (.cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse6 (* 5 .cse1))) (< (+ .cse0 (* (- 50) .cse1 .cse1) (* (- 1) .cse1 .cse1 .cse1 .cse1 .cse1) (* (- 10) .cse1 .cse1 .cse1 .cse1) (+ (* |c_ULTIMATE.start_main_~y~0#1| 195) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 90) 78 (div (+ (* .cse2 42) .cse3 (* .cse4 2159) (* 365 .cse5)) 12)) .cse6 1) (+ .cse0 (* .cse1 .cse1 .cse1 .cse1 .cse1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 5) (div (+ .cse3 (* 119 .cse4) (* .cse5 65) (* .cse2 18)) 12) 1) .cse6 (* 5 .cse1 .cse1 .cse1 .cse1) (* 10 .cse1 .cse1) 1))) (let ((.cse7 (+ (+ 1 .cse1) 1))) (= (* .cse7 .cse7) (* .cse7 |c_ULTIMATE.start_main_~k~0#1|))) (not (< .cse8 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse8 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-17 02:30:44,996 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (let ((.cse0 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) (.cse2 (+ 1 .cse7))) (or (< (+ 1 .cse0) |c_ULTIMATE.start_main_~k~0#1|) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (let ((.cse1 (+ (+ .cse2 1) 1))) (= (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (* .cse1 .cse1))) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (let ((.cse4 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse8 (* .cse2 5)) (.cse9 (* .cse2 .cse2 .cse2 10))) (< (+ (* .cse2 .cse2 .cse2 .cse2 (- 10)) (+ (+ (div (+ (* .cse3 605) .cse4 (* .cse5 54) (* 4799 .cse6)) 12) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 160) 214 (* |c_ULTIMATE.start_main_~y~0#1| 500)) (* 90 .cse7 .cse7 .cse7) 78 (* 195 .cse7)) .cse8 (* .cse2 .cse2 (- 50)) .cse9 (* .cse2 .cse2 .cse2 .cse2 .cse2 (- 1)) 1) (+ (+ (* 10 .cse7 .cse7 .cse7) (+ (div (+ .cse4 (* .cse6 719) (* .cse3 185) (* .cse5 30)) 12) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 40) (* |c_ULTIMATE.start_main_~y~0#1| 50) 17) (* 5 .cse7) 1) (* .cse2 .cse2 10) (* .cse2 .cse2 .cse2 .cse2 5) (* .cse2 .cse2 .cse2 .cse2 .cse2) .cse8 .cse9 1)))))) is different from false [2023-02-17 02:33:24,800 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (let ((.cse8 (+ 1 .cse9))) (let ((.cse7 (+ .cse8 1))) (let ((.cse14 (+ .cse7 1))) (let ((.cse6 (+ .cse14 1))) (let ((.cse15 (+ .cse6 1))) (let ((.cse5 (+ 1 .cse15))) (let ((.cse4 (+ .cse5 1))) (let ((.cse16 (+ .cse4 1))) (let ((.cse17 (+ .cse16 1))) (let ((.cse3 (+ .cse17 1))) (let ((.cse18 (+ .cse3 1))) (let ((.cse19 (+ .cse18 1))) (let ((.cse1 (+ .cse19 1)) (.cse0 (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (let ((.cse2 (* .cse1 5)) (.cse10 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse20 (* .cse1 .cse1 .cse1 10))) (< (+ (* (- 1) .cse1 .cse1 .cse1 .cse1 .cse1) .cse2 (+ (+ (+ (* .cse3 1025) (* 250 .cse3 .cse3 .cse3) 455 (+ (+ (+ (* 4520 .cse4) 2108 (+ 3069 (* 810 .cse5 .cse5 .cse5) (+ (+ (* 1210 .cse6 .cse6 .cse6) (* 12155 .cse6) (+ (+ (* 20345 .cse7) 9763 (* 1690 .cse7 .cse7 .cse7) (+ (* .cse8 25550) (* .cse8 .cse8 .cse8 1960) (+ (* 2250 .cse9 .cse9 .cse9) (+ (div (+ .cse10 (* .cse11 8165) (* .cse12 198) (* .cse13 261119)) 12) (* 2560 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 38480) 18616) 15240 (* 31575 .cse9)) 12299)) (* .cse14 .cse14 .cse14 1440) 7602 (* 15900 .cse14)) 5786) (* 9050 .cse15) 4285 (* 1000 .cse15 .cse15 .cse15)) (* .cse5 6525)) (* .cse4 .cse4 .cse4 640)) (* .cse16 .cse16 .cse16 490) 1372 (* .cse16 2975)) 831 (* .cse17 .cse17 .cse17 360) (* .cse17 1830))) (* .cse18 500) 214 (* .cse18 .cse18 .cse18 160)) (* .cse19 .cse19 .cse19 90) 78 (* .cse19 195)) (* .cse1 .cse1 (- 50)) .cse20 (* .cse1 .cse1 .cse1 .cse1 (- 10)) 1) (+ (* .cse1 .cse1 10) .cse2 (+ (* .cse19 .cse19 .cse19 10) (+ (* .cse18 50) (+ (* .cse3 195) 78 (* .cse3 .cse3 .cse3 90) (+ 214 (* 160 .cse17 .cse17 .cse17) (+ (* .cse16 1025) (+ 831 (* .cse4 1830) (* .cse4 .cse4 .cse4 360) (+ 1372 (+ (* 4520 .cse15) (+ 3069 (* 6525 .cse6) (* 810 .cse6 .cse6 .cse6) (+ (+ (* 12155 .cse7) (* 1210 .cse7 .cse7 .cse7) (+ (* .cse8 .cse8 .cse8 1440) (+ 9763 (* 1690 .cse9 .cse9 .cse9) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 1960) (* |c_ULTIMATE.start_main_~y~0#1| 25550) 12299 (div (+ .cse10 (* .cse12 174) (* 176399 .cse13) (* .cse11 6305)) 12)) (* 20345 .cse9)) (* .cse8 15900) 7602) 5786) (* 9050 .cse14) (* .cse14 .cse14 .cse14 1000) 4285)) 2108 (* 640 .cse15 .cse15 .cse15)) (* .cse5 .cse5 .cse5 490) (* .cse5 2975))) 455 (* 250 .cse16 .cse16 .cse16)) (* .cse17 500))) (* .cse18 .cse18 .cse18 40) 17) (* .cse19 5) 1) .cse20 (* .cse1 .cse1 .cse1 .cse1 .cse1) 1 (* .cse1 .cse1 .cse1 .cse1 5)))) (let ((.cse21 (+ 1 (+ .cse1 1)))) (= (* |c_ULTIMATE.start_main_~k~0#1| .cse21) (* .cse21 .cse21))) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|)))))))))))))))) is different from false [2023-02-17 02:33:26,867 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse12 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (let ((.cse11 (+ 1 .cse12))) (let ((.cse10 (+ .cse11 1))) (let ((.cse17 (+ .cse10 1))) (let ((.cse9 (+ .cse17 1))) (let ((.cse8 (+ .cse9 1))) (let ((.cse7 (+ 1 .cse8))) (let ((.cse18 (+ .cse7 1))) (let ((.cse6 (+ .cse18 1))) (let ((.cse5 (+ .cse6 1))) (let ((.cse4 (+ .cse5 1))) (let ((.cse3 (+ .cse4 1))) (let ((.cse2 (+ .cse3 1))) (let ((.cse1 (+ .cse2 1))) (let ((.cse0 (+ .cse1 1))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (let ((.cse19 (* 10 .cse0 .cse0 .cse0)) (.cse13 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (.cse16 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse20 (* 5 .cse0))) (< (+ (* (- 1) .cse0 .cse0 .cse0 .cse0 .cse0) (+ (* .cse1 195) (* .cse1 .cse1 .cse1 90) 78 (+ (* 160 .cse2 .cse2 .cse2) (+ (* .cse3 .cse3 .cse3 250) 455 (+ 831 (* .cse4 1830) (+ (* .cse5 2975) 1372 (* .cse5 .cse5 .cse5 490) (+ 2108 (* .cse6 4520) (* .cse6 .cse6 .cse6 640) (+ 3069 (+ (* .cse7 .cse7 .cse7 1000) (+ (* 12155 .cse8) (+ 7602 (* 1440 .cse9 .cse9 .cse9) (+ 9763 (+ (* 25550 .cse10) 12299 (+ (* .cse11 31575) (* .cse11 .cse11 .cse11 2250) 15240 (+ (* 38480 .cse12) (* 2560 .cse12 .cse12 .cse12) (+ (* |c_ULTIMATE.start_main_~y~0#1| 46325) 22457 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2890) (div (+ .cse13 (* .cse14 210) (* 9185 .cse15) (* .cse16 312119)) 12)) 18616)) (* 1960 .cse10 .cse10 .cse10)) (* .cse17 .cse17 .cse17 1690) (* .cse17 20345)) (* 15900 .cse9)) (* 1210 .cse8 .cse8 .cse8) 5786) (* .cse7 9050) 4285) (* 810 .cse18 .cse18 .cse18) (* .cse18 6525)))) (* .cse4 .cse4 .cse4 360)) (* .cse3 1025)) 214 (* .cse2 500))) .cse19 (* (- 50) .cse0 .cse0) (* (- 10) .cse0 .cse0 .cse0 .cse0) .cse20 1) (+ (* 5 .cse0 .cse0 .cse0 .cse0) .cse19 (+ (* .cse1 5) (* .cse1 .cse1 .cse1 10) (+ (* .cse2 50) (* 40 .cse2 .cse2 .cse2) (+ (* .cse3 .cse3 .cse3 90) 78 (+ 214 (* 160 .cse4 .cse4 .cse4) (+ (+ 831 (* .cse6 .cse6 .cse6 360) (* .cse6 1830) (+ (+ 2108 (+ 3069 (* 6525 .cse8) (+ (* 9050 .cse9) (+ (+ (* 15900 .cse10) 7602 (+ 9763 (* .cse11 20345) (+ (* 25550 .cse12) (* 1960 .cse12 .cse12 .cse12) 12299 (+ (div (+ .cse13 (* .cse16 215999) (* .cse15 7205) (* .cse14 186)) 12) (* |c_ULTIMATE.start_main_~y~0#1| 31575) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2250) 15240)) (* .cse11 .cse11 .cse11 1690)) (* .cse10 .cse10 .cse10 1440)) (* 1210 .cse17 .cse17 .cse17) 5786 (* 12155 .cse17)) (* 1000 .cse9 .cse9 .cse9) 4285) (* 810 .cse8 .cse8 .cse8)) (* .cse7 .cse7 .cse7 640) (* .cse7 4520)) 1372 (* .cse18 2975) (* .cse18 .cse18 .cse18 490))) (* 250 .cse5 .cse5 .cse5) (* .cse5 1025) 455) (* .cse4 500)) (* .cse3 195)) 17) 1) (* .cse0 .cse0 .cse0 .cse0 .cse0) (* 10 .cse0 .cse0) .cse20 1))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse21 (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (not (< .cse21 |ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (let ((.cse22 (+ (+ 1 .cse0) 1))) (= (* .cse22 |ULTIMATE.start_main_~k~0#1|) (* .cse22 .cse22))) (< (+ .cse21 1) |ULTIMATE.start_main_~k~0#1|)))))))))))))))))))) is different from false [2023-02-17 02:33:26,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:33:26,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367134187] [2023-02-17 02:33:26,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:33:26,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338553812] [2023-02-17 02:33:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338553812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:33:26,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:33:26,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-17 02:33:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588158345] [2023-02-17 02:33:26,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:33:26,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 02:33:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:33:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 02:33:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1699, Unknown=16, NotChecked=364, Total=2450 [2023-02-17 02:33:26,879 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand has 27 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-17 02:33:29,092 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 [] [2023-02-17 02:33:31,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:33:33,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:33:35,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:33:37,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:33:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:33:38,002 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2023-02-17 02:33:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 02:33:38,003 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 157 [2023-02-17 02:33:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:33:38,004 INFO L225 Difference]: With dead ends: 179 [2023-02-17 02:33:38,004 INFO L226 Difference]: Without dead ends: 173 [2023-02-17 02:33:38,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 180.7s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=16, NotChecked=388, Total=2756 [2023-02-17 02:33:38,005 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:33:38,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1036 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1550 Invalid, 5 Unknown, 0 Unchecked, 11.0s Time] [2023-02-17 02:33:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-17 02:33:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-02-17 02:33:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 130 states have internal predecessors, (132), 23 states have call successors, (23), 21 states have call predecessors, (23), 20 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-17 02:33:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2023-02-17 02:33:38,025 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 157 [2023-02-17 02:33:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:33:38,025 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2023-02-17 02:33:38,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-17 02:33:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2023-02-17 02:33:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-02-17 02:33:38,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:33:38,026 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:33:38,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 02:33:38,235 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 [2023-02-17 02:33:38,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:33:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:33:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2042850202, now seen corresponding path program 8 times [2023-02-17 02:33:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:33:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456011473] [2023-02-17 02:33:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:33:38,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:33:38,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:33:38,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373869047] [2023-02-17 02:33:38,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:33:38,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:33:38,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:33:38,252 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) [2023-02-17 02:33:38,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process