./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/egcd3-ll_unwindbound100.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 d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:44:27,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:44:27,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:44:27,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:44:27,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:44:27,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:44:27,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:44:27,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:44:27,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:44:27,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:44:27,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:44:27,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:44:27,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:44:27,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:44:27,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:44:27,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:44:27,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:44:27,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:44:27,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:44:27,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:44:27,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:44:27,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:44:27,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:44:27,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:44:27,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:44:27,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:44:27,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:44:27,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:44:27,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:44:27,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:44:27,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:44:27,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:44:27,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:44:27,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:44:27,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:44:27,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:44:27,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:44:27,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:44:27,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:44:27,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:44:27,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:44:27,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:44:27,649 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:44:27,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:44:27,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:44:27,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:44:27,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:44:27,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:44:27,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:44:27,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:44:27,651 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:44:27,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:44:27,652 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:44:27,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:44:27,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:44:27,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:44:27,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:44:27,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:44:27,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:44:27,653 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:44:27,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:44:27,653 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:44:27,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:44:27,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:44:27,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:44:27,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:44:27,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:44:27,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:44:27,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:44:27,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:44:27,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:44:27,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:44:27,655 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:44:27,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:44:27,655 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:44:27,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:44:27,656 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:44:27,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2023-02-15 20:44:27,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:44:27,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:44:27,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:44:27,834 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:44:27,835 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:44:27,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2023-02-15 20:44:28,800 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:44:28,975 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:44:28,977 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2023-02-15 20:44:28,982 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90fa656c0/c8e6631e66ae4216a7d9f647b73d921c/FLAGcb69364ab [2023-02-15 20:44:28,994 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90fa656c0/c8e6631e66ae4216a7d9f647b73d921c [2023-02-15 20:44:28,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:44:28,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:44:28,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:44:28,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:44:29,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:44:29,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:44:28" (1/1) ... [2023-02-15 20:44:29,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcabf92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29, skipping insertion in model container [2023-02-15 20:44:29,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:44:28" (1/1) ... [2023-02-15 20:44:29,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:44:29,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:44:29,102 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/egcd3-ll_unwindbound100.c[490,503] [2023-02-15 20:44:29,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:44:29,119 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:44:29,126 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/egcd3-ll_unwindbound100.c[490,503] [2023-02-15 20:44:29,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:44:29,140 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:44:29,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29 WrapperNode [2023-02-15 20:44:29,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:44:29,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:44:29,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:44:29,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:44:29,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,161 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2023-02-15 20:44:29,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:44:29,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:44:29,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:44:29,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:44:29,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,175 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:44:29,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:44:29,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:44:29,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:44:29,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (1/1) ... [2023-02-15 20:44:29,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:44:29,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:29,209 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) [2023-02-15 20:44:29,226 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 [2023-02-15 20:44:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:44:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:44:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:44:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:44:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:44:29,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:44:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:44:29,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:44:29,287 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:44:29,288 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:44:29,433 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:44:29,452 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:44:29,452 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 20:44:29,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:44:29 BoogieIcfgContainer [2023-02-15 20:44:29,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:44:29,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:44:29,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:44:29,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:44:29,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:44:28" (1/3) ... [2023-02-15 20:44:29,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9631ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:44:29, skipping insertion in model container [2023-02-15 20:44:29,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:44:29" (2/3) ... [2023-02-15 20:44:29,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9631ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:44:29, skipping insertion in model container [2023-02-15 20:44:29,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:44:29" (3/3) ... [2023-02-15 20:44:29,459 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2023-02-15 20:44:29,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:44:29,492 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:44:29,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:44:29,534 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;@433558a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:44:29,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:44:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 20:44:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 20:44:29,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:29,543 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:29,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:29,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2023-02-15 20:44:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765380613] [2023-02-15 20:44:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:29,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765380613] [2023-02-15 20:44:29,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 20:44:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443423662] [2023-02-15 20:44:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:29,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:29,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:29,679 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) [2023-02-15 20:44:29,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:44:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:29,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 20:44:29,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:44:29,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:44:29,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443423662] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:44:29,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:44:29,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:44:29,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308102009] [2023-02-15 20:44:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:29,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:44:29,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:44:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:44:29,764 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 20:44:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:29,782 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2023-02-15 20:44:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:44:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-15 20:44:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:29,789 INFO L225 Difference]: With dead ends: 67 [2023-02-15 20:44:29,790 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 20:44:29,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:44:29,802 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2023-02-15 20:44:29,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 20:44:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 20:44:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 20:44:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-02-15 20:44:29,831 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2023-02-15 20:44:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:29,831 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-02-15 20:44:29,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 20:44:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-02-15 20:44:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:44:29,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:29,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:29,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 20:44:30,037 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 [2023-02-15 20:44:30,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2023-02-15 20:44:30,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:30,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798868351] [2023-02-15 20:44:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:30,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:30,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:30,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908228125] [2023-02-15 20:44:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:30,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:30,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:30,062 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) [2023-02-15 20:44:30,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:44:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:30,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:44:30,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:30,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:44:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798868351] [2023-02-15 20:44:30,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908228125] [2023-02-15 20:44:30,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908228125] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:44:30,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:44:30,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:44:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888324898] [2023-02-15 20:44:30,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:30,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:44:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:44:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:44:30,155 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:30,168 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-02-15 20:44:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:44:30,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-15 20:44:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:30,169 INFO L225 Difference]: With dead ends: 40 [2023-02-15 20:44:30,169 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 20:44:30,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:44:30,170 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:30,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 20:44:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-15 20:44:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 20:44:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-02-15 20:44:30,175 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-02-15 20:44:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:30,176 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-02-15 20:44:30,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-02-15 20:44:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 20:44:30,177 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:30,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:30,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:30,381 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 [2023-02-15 20:44:30,382 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2023-02-15 20:44:30,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:30,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620088137] [2023-02-15 20:44:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:30,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:30,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:30,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741157202] [2023-02-15 20:44:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:30,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:30,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:30,394 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) [2023-02-15 20:44:30,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:44:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:30,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:44:30,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:44:30,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:44:30,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620088137] [2023-02-15 20:44:30,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741157202] [2023-02-15 20:44:30,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741157202] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:44:30,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:44:30,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 20:44:30,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551843966] [2023-02-15 20:44:30,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:30,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:44:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:44:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:44:30,462 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:30,531 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-02-15 20:44:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:44:30,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-15 20:44:30,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:30,532 INFO L225 Difference]: With dead ends: 53 [2023-02-15 20:44:30,532 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 20:44:30,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:44:30,533 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:30,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 20:44:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-02-15 20:44:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 20:44:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-02-15 20:44:30,540 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2023-02-15 20:44:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:30,540 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-02-15 20:44:30,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-02-15 20:44:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 20:44:30,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:30,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:30,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:30,745 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 [2023-02-15 20:44:30,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:30,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2023-02-15 20:44:30,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:30,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113222854] [2023-02-15 20:44:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:30,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:30,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:30,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345248468] [2023-02-15 20:44:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:30,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:30,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:30,761 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) [2023-02-15 20:44:30,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:44:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:44:30,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:30,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:44:30,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:30,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113222854] [2023-02-15 20:44:30,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:30,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345248468] [2023-02-15 20:44:30,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345248468] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:44:30,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:44:30,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:44:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880191008] [2023-02-15 20:44:30,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:30,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:44:30,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:44:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:44:30,846 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:30,874 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-02-15 20:44:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:44:30,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-15 20:44:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:30,875 INFO L225 Difference]: With dead ends: 58 [2023-02-15 20:44:30,875 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 20:44:30,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:44:30,876 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:30,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 20:44:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-15 20:44:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 20:44:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-02-15 20:44:30,882 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2023-02-15 20:44:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:30,882 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-02-15 20:44:30,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-02-15 20:44:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 20:44:30,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:30,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:30,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 20:44:31,087 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 [2023-02-15 20:44:31,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:31,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:31,088 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2023-02-15 20:44:31,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:31,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732773231] [2023-02-15 20:44:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:31,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:31,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:31,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231634942] [2023-02-15 20:44:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:31,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:31,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:31,105 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) [2023-02-15 20:44:31,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:44:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:31,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:44:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:44:31,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:44:31,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732773231] [2023-02-15 20:44:31,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231634942] [2023-02-15 20:44:31,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231634942] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:44:31,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:44:31,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 20:44:31,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901738384] [2023-02-15 20:44:31,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:31,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:44:31,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:44:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:44:31,324 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:31,433 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-02-15 20:44:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 20:44:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-15 20:44:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:31,437 INFO L225 Difference]: With dead ends: 54 [2023-02-15 20:44:31,437 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 20:44:31,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:44:31,442 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 176 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 [2023-02-15 20:44:31,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:44:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 20:44:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-15 20:44:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 20:44:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-02-15 20:44:31,462 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2023-02-15 20:44:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:31,462 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-02-15 20:44:31,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-02-15 20:44:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 20:44:31,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:31,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:31,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:31,667 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 [2023-02-15 20:44:31,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2023-02-15 20:44:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:31,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539470962] [2023-02-15 20:44:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:31,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:31,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121993060] [2023-02-15 20:44:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:31,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:31,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:31,684 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) [2023-02-15 20:44:31,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:44:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:44:31,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:31,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:31,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539470962] [2023-02-15 20:44:31,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121993060] [2023-02-15 20:44:31,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121993060] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:31,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:31,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 20:44:31,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661579532] [2023-02-15 20:44:31,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:31,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:44:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:44:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:44:31,812 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:31,934 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2023-02-15 20:44:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:44:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-02-15 20:44:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:31,936 INFO L225 Difference]: With dead ends: 147 [2023-02-15 20:44:31,937 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 20:44:31,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:44:31,937 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:31,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 234 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:44:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 20:44:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2023-02-15 20:44:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-15 20:44:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-15 20:44:31,950 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2023-02-15 20:44:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:31,951 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-15 20:44:31,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-15 20:44:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 20:44:31,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:31,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:31,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:32,156 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 [2023-02-15 20:44:32,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2023-02-15 20:44:32,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:32,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552053180] [2023-02-15 20:44:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:32,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:32,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:32,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354966892] [2023-02-15 20:44:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:32,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:32,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:32,168 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) [2023-02-15 20:44:32,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:44:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:44:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:44:32,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:44:32,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:32,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552053180] [2023-02-15 20:44:32,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:32,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354966892] [2023-02-15 20:44:32,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354966892] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:32,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:32,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-15 20:44:32,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392207191] [2023-02-15 20:44:32,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:32,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:44:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:44:32,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:44:32,363 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 20:44:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:32,549 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2023-02-15 20:44:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 20:44:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-15 20:44:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:32,550 INFO L225 Difference]: With dead ends: 183 [2023-02-15 20:44:32,550 INFO L226 Difference]: Without dead ends: 171 [2023-02-15 20:44:32,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:44:32,551 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:32,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:44:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-15 20:44:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2023-02-15 20:44:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-15 20:44:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2023-02-15 20:44:32,573 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2023-02-15 20:44:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:32,573 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2023-02-15 20:44:32,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 20:44:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2023-02-15 20:44:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 20:44:32,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:32,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:32,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 20:44:32,778 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 [2023-02-15 20:44:32,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:32,779 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2023-02-15 20:44:32,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:32,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186393540] [2023-02-15 20:44:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:32,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:32,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:32,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89617190] [2023-02-15 20:44:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:32,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:32,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:32,789 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) [2023-02-15 20:44:32,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:44:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:32,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:44:32,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:44:32,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:33,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186393540] [2023-02-15 20:44:33,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89617190] [2023-02-15 20:44:33,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89617190] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:44:33,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:44:33,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 20:44:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075213603] [2023-02-15 20:44:33,005 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:33,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:44:33,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:44:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:44:33,006 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 20:44:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:33,127 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2023-02-15 20:44:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 20:44:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-15 20:44:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:33,128 INFO L225 Difference]: With dead ends: 143 [2023-02-15 20:44:33,128 INFO L226 Difference]: Without dead ends: 141 [2023-02-15 20:44:33,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:44:33,129 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:33,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 175 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:44:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-15 20:44:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-02-15 20:44:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-15 20:44:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2023-02-15 20:44:33,145 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2023-02-15 20:44:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:33,145 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2023-02-15 20:44:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 20:44:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2023-02-15 20:44:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 20:44:33,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:33,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:33,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:33,350 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 [2023-02-15 20:44:33,353 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:33,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2023-02-15 20:44:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:33,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354876] [2023-02-15 20:44:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:33,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:33,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:33,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383786573] [2023-02-15 20:44:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:33,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:33,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:33,363 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) [2023-02-15 20:44:33,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 20:44:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:33,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:44:33,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:33,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:33,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354876] [2023-02-15 20:44:33,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383786573] [2023-02-15 20:44:33,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383786573] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:33,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:33,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-02-15 20:44:33,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035403348] [2023-02-15 20:44:33,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:33,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:44:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:44:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:44:33,667 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:33,827 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2023-02-15 20:44:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 20:44:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-15 20:44:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:33,828 INFO L225 Difference]: With dead ends: 175 [2023-02-15 20:44:33,828 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 20:44:33,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:44:33,829 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 79 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:33,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 386 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:44:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 20:44:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2023-02-15 20:44:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-15 20:44:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2023-02-15 20:44:33,844 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2023-02-15 20:44:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:33,844 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2023-02-15 20:44:33,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2023-02-15 20:44:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 20:44:33,845 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:33,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:33,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:34,049 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 [2023-02-15 20:44:34,049 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:34,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2023-02-15 20:44:34,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:34,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820120891] [2023-02-15 20:44:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:34,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:34,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:34,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772920162] [2023-02-15 20:44:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:34,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:34,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:34,059 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) [2023-02-15 20:44:34,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 20:44:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:44:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:34,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:44:34,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:34,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820120891] [2023-02-15 20:44:34,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:34,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772920162] [2023-02-15 20:44:34,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772920162] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:44:34,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:44:34,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:44:34,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589023823] [2023-02-15 20:44:34,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:34,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:44:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:44:34,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:44:34,153 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:34,190 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2023-02-15 20:44:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:44:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-02-15 20:44:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:34,193 INFO L225 Difference]: With dead ends: 237 [2023-02-15 20:44:34,193 INFO L226 Difference]: Without dead ends: 170 [2023-02-15 20:44:34,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:44:34,195 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:34,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 130 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-15 20:44:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-02-15 20:44:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-15 20:44:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2023-02-15 20:44:34,213 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2023-02-15 20:44:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:34,213 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2023-02-15 20:44:34,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2023-02-15 20:44:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:44:34,216 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:34,216 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:34,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:34,421 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 [2023-02-15 20:44:34,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2023-02-15 20:44:34,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:34,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218290761] [2023-02-15 20:44:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:34,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:34,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:34,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963347038] [2023-02-15 20:44:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:34,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:34,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:34,437 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) [2023-02-15 20:44:34,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 20:44:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:34,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:44:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 20:44:34,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 20:44:34,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218290761] [2023-02-15 20:44:34,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963347038] [2023-02-15 20:44:34,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963347038] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:44:34,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:44:34,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-15 20:44:34,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899117192] [2023-02-15 20:44:34,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:34,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:44:34,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:34,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:44:34,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:44:34,597 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:34,644 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2023-02-15 20:44:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:44:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-15 20:44:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:34,645 INFO L225 Difference]: With dead ends: 235 [2023-02-15 20:44:34,645 INFO L226 Difference]: Without dead ends: 233 [2023-02-15 20:44:34,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:44:34,646 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:34,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-15 20:44:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2023-02-15 20:44:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-15 20:44:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2023-02-15 20:44:34,664 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2023-02-15 20:44:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:34,664 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2023-02-15 20:44:34,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2023-02-15 20:44:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:44:34,664 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:34,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:34,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:34,868 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 [2023-02-15 20:44:34,869 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2023-02-15 20:44:34,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:34,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763346748] [2023-02-15 20:44:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:34,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:34,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965404981] [2023-02-15 20:44:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:34,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:34,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:34,876 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) [2023-02-15 20:44:34,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 20:44:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 20:44:34,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:35,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:35,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763346748] [2023-02-15 20:44:35,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965404981] [2023-02-15 20:44:35,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965404981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:35,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:35,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 17 [2023-02-15 20:44:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593271150] [2023-02-15 20:44:35,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:35,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 20:44:35,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 20:44:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:44:35,246 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 20:44:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:36,810 INFO L93 Difference]: Finished difference Result 395 states and 573 transitions. [2023-02-15 20:44:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 20:44:36,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2023-02-15 20:44:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:36,822 INFO L225 Difference]: With dead ends: 395 [2023-02-15 20:44:36,822 INFO L226 Difference]: Without dead ends: 393 [2023-02-15 20:44:36,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:44:36,823 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 356 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 144 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:36,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 271 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 632 Invalid, 6 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 20:44:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-02-15 20:44:36,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 359. [2023-02-15 20:44:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 271 states have (on average 1.4095940959409594) internal successors, (382), 286 states have internal predecessors, (382), 71 states have call successors, (71), 16 states have call predecessors, (71), 16 states have return successors, (70), 56 states have call predecessors, (70), 70 states have call successors, (70) [2023-02-15 20:44:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 523 transitions. [2023-02-15 20:44:36,861 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 523 transitions. Word has length 37 [2023-02-15 20:44:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:36,862 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 523 transitions. [2023-02-15 20:44:36,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 20:44:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 523 transitions. [2023-02-15 20:44:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 20:44:36,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:36,863 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:36,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:37,067 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 [2023-02-15 20:44:37,067 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2023-02-15 20:44:37,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:37,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309779032] [2023-02-15 20:44:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:37,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:37,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:37,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108145147] [2023-02-15 20:44:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:37,075 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) [2023-02-15 20:44:37,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 20:44:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:44:37,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 20:44:37,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:44:37,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:37,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309779032] [2023-02-15 20:44:37,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:37,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108145147] [2023-02-15 20:44:37,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108145147] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:44:37,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:44:37,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-15 20:44:37,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562919898] [2023-02-15 20:44:37,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:37,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:44:37,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:37,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:44:37,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:44:37,189 INFO L87 Difference]: Start difference. First operand 359 states and 523 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 20:44:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:37,274 INFO L93 Difference]: Finished difference Result 369 states and 532 transitions. [2023-02-15 20:44:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:44:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-02-15 20:44:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:37,276 INFO L225 Difference]: With dead ends: 369 [2023-02-15 20:44:37,276 INFO L226 Difference]: Without dead ends: 367 [2023-02-15 20:44:37,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:44:37,277 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:37,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-15 20:44:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2023-02-15 20:44:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 274 states have (on average 1.397810218978102) internal successors, (383), 289 states have internal predecessors, (383), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (70), 56 states have call predecessors, (70), 70 states have call successors, (70) [2023-02-15 20:44:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 524 transitions. [2023-02-15 20:44:37,317 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 524 transitions. Word has length 40 [2023-02-15 20:44:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:37,317 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 524 transitions. [2023-02-15 20:44:37,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 20:44:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 524 transitions. [2023-02-15 20:44:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 20:44:37,318 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:37,318 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:37,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:37,522 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 [2023-02-15 20:44:37,522 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2023-02-15 20:44:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:37,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627645291] [2023-02-15 20:44:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:37,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:37,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110930501] [2023-02-15 20:44:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:37,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:37,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:37,551 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) [2023-02-15 20:44:37,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 20:44:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:44:37,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 20:44:37,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 20:44:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:37,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627645291] [2023-02-15 20:44:37,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:37,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110930501] [2023-02-15 20:44:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110930501] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:37,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:37,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-15 20:44:37,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857665029] [2023-02-15 20:44:37,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:44:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:44:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:44:37,673 INFO L87 Difference]: Start difference. First operand 363 states and 524 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:37,883 INFO L93 Difference]: Finished difference Result 882 states and 1252 transitions. [2023-02-15 20:44:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 20:44:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-02-15 20:44:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:37,885 INFO L225 Difference]: With dead ends: 882 [2023-02-15 20:44:37,885 INFO L226 Difference]: Without dead ends: 639 [2023-02-15 20:44:37,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:44:37,886 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 137 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:37,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 312 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:44:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-02-15 20:44:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 609. [2023-02-15 20:44:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 445 states have (on average 1.3325842696629213) internal successors, (593), 463 states have internal predecessors, (593), 122 states have call successors, (122), 41 states have call predecessors, (122), 41 states have return successors, (118), 104 states have call predecessors, (118), 118 states have call successors, (118) [2023-02-15 20:44:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 833 transitions. [2023-02-15 20:44:37,966 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 833 transitions. Word has length 38 [2023-02-15 20:44:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:37,968 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 833 transitions. [2023-02-15 20:44:37,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 833 transitions. [2023-02-15 20:44:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:44:37,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:37,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:37,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:38,173 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 [2023-02-15 20:44:38,173 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:38,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2023-02-15 20:44:38,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:38,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709400442] [2023-02-15 20:44:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:38,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:38,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:38,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027311327] [2023-02-15 20:44:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:38,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:38,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:38,197 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) [2023-02-15 20:44:38,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 20:44:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 20:44:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:38,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:44:38,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:38,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709400442] [2023-02-15 20:44:38,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:38,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027311327] [2023-02-15 20:44:38,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027311327] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:38,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:38,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-15 20:44:38,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183206862] [2023-02-15 20:44:38,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:38,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:44:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:44:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:44:38,342 INFO L87 Difference]: Start difference. First operand 609 states and 833 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:38,641 INFO L93 Difference]: Finished difference Result 1294 states and 1807 transitions. [2023-02-15 20:44:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 20:44:38,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-02-15 20:44:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:38,644 INFO L225 Difference]: With dead ends: 1294 [2023-02-15 20:44:38,644 INFO L226 Difference]: Without dead ends: 931 [2023-02-15 20:44:38,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:44:38,646 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 214 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:38,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 306 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:44:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-02-15 20:44:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 891. [2023-02-15 20:44:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 643 states have (on average 1.3001555209953344) internal successors, (836), 666 states have internal predecessors, (836), 190 states have call successors, (190), 57 states have call predecessors, (190), 57 states have return successors, (184), 167 states have call predecessors, (184), 184 states have call successors, (184) [2023-02-15 20:44:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1210 transitions. [2023-02-15 20:44:38,748 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1210 transitions. Word has length 39 [2023-02-15 20:44:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:38,748 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1210 transitions. [2023-02-15 20:44:38,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:44:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1210 transitions. [2023-02-15 20:44:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 20:44:38,749 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:38,749 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:38,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-15 20:44:38,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 20:44:38,953 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash -827121215, now seen corresponding path program 2 times [2023-02-15 20:44:38,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:38,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303684696] [2023-02-15 20:44:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:38,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:38,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:38,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359864895] [2023-02-15 20:44:38,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:44:38,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:38,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:38,962 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:38,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 20:44:39,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:44:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:44:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:44:39,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 20:44:39,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:44:39,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303684696] [2023-02-15 20:44:39,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359864895] [2023-02-15 20:44:39,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359864895] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:44:39,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:44:39,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:44:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323128175] [2023-02-15 20:44:39,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:39,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:44:39,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:39,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:44:39,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:44:39,023 INFO L87 Difference]: Start difference. First operand 891 states and 1210 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:39,195 INFO L93 Difference]: Finished difference Result 1367 states and 1906 transitions. [2023-02-15 20:44:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:44:39,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-02-15 20:44:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:39,198 INFO L225 Difference]: With dead ends: 1367 [2023-02-15 20:44:39,198 INFO L226 Difference]: Without dead ends: 1023 [2023-02-15 20:44:39,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:44:39,199 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:39,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 154 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2023-02-15 20:44:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 861. [2023-02-15 20:44:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 631 states have (on average 1.294770206022187) internal successors, (817), 653 states have internal predecessors, (817), 172 states have call successors, (172), 57 states have call predecessors, (172), 57 states have return successors, (166), 150 states have call predecessors, (166), 166 states have call successors, (166) [2023-02-15 20:44:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1155 transitions. [2023-02-15 20:44:39,299 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1155 transitions. Word has length 40 [2023-02-15 20:44:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:39,299 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1155 transitions. [2023-02-15 20:44:39,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:44:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1155 transitions. [2023-02-15 20:44:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 20:44:39,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:39,300 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:39,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:39,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 20:44:39,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:39,505 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2023-02-15 20:44:39,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:39,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523827239] [2023-02-15 20:44:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:39,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:39,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:39,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309083449] [2023-02-15 20:44:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:39,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:39,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:39,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 20:44:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-15 20:44:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:44:40,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 20:44:41,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523827239] [2023-02-15 20:44:41,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309083449] [2023-02-15 20:44:41,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309083449] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:41,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:41,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-02-15 20:44:41,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427094200] [2023-02-15 20:44:41,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:41,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 20:44:41,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:41,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 20:44:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-02-15 20:44:41,500 INFO L87 Difference]: Start difference. First operand 861 states and 1155 transitions. Second operand has 27 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-15 20:44:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:52,098 INFO L93 Difference]: Finished difference Result 1423 states and 1909 transitions. [2023-02-15 20:44:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 20:44:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 54 [2023-02-15 20:44:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:52,102 INFO L225 Difference]: With dead ends: 1423 [2023-02-15 20:44:52,102 INFO L226 Difference]: Without dead ends: 1052 [2023-02-15 20:44:52,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=625, Invalid=2915, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 20:44:52,104 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 277 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:52,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 501 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-02-15 20:44:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-02-15 20:44:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 949. [2023-02-15 20:44:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 700 states have (on average 1.29) internal successors, (903), 719 states have internal predecessors, (903), 184 states have call successors, (184), 64 states have call predecessors, (184), 64 states have return successors, (180), 165 states have call predecessors, (180), 180 states have call successors, (180) [2023-02-15 20:44:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1267 transitions. [2023-02-15 20:44:52,298 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1267 transitions. Word has length 54 [2023-02-15 20:44:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:52,299 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1267 transitions. [2023-02-15 20:44:52,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-15 20:44:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1267 transitions. [2023-02-15 20:44:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 20:44:52,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:52,300 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:52,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:52,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 20:44:52,504 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2023-02-15 20:44:52,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:52,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123846927] [2023-02-15 20:44:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:52,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:52,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:52,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096317824] [2023-02-15 20:44:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:52,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:52,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:52,516 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:52,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 20:44:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:52,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:44:52,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:44:52,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:44:52,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123846927] [2023-02-15 20:44:52,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096317824] [2023-02-15 20:44:52,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096317824] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:52,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:52,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-15 20:44:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798939352] [2023-02-15 20:44:52,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:52,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:44:52,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:44:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:44:52,752 INFO L87 Difference]: Start difference. First operand 949 states and 1267 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 20:44:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:53,359 INFO L93 Difference]: Finished difference Result 2004 states and 2782 transitions. [2023-02-15 20:44:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 20:44:53,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2023-02-15 20:44:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:53,365 INFO L225 Difference]: With dead ends: 2004 [2023-02-15 20:44:53,365 INFO L226 Difference]: Without dead ends: 1982 [2023-02-15 20:44:53,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:44:53,366 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 297 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:53,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 475 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:44:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2023-02-15 20:44:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1876. [2023-02-15 20:44:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1384 states have (on average 1.3099710982658959) internal successors, (1813), 1432 states have internal predecessors, (1813), 387 states have call successors, (387), 104 states have call predecessors, (387), 104 states have return successors, (379), 339 states have call predecessors, (379), 379 states have call successors, (379) [2023-02-15 20:44:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2579 transitions. [2023-02-15 20:44:53,696 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2579 transitions. Word has length 60 [2023-02-15 20:44:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:53,696 INFO L495 AbstractCegarLoop]: Abstraction has 1876 states and 2579 transitions. [2023-02-15 20:44:53,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 20:44:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2579 transitions. [2023-02-15 20:44:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 20:44:53,697 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:53,697 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:53,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 20:44:53,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 20:44:53,901 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash -958393407, now seen corresponding path program 2 times [2023-02-15 20:44:53,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:53,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104899399] [2023-02-15 20:44:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:53,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:53,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544916964] [2023-02-15 20:44:53,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:44:53,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:53,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:53,908 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:53,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 20:44:53,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:44:53,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:44:53,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 20:44:53,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:44:54,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:44:54,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:54,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104899399] [2023-02-15 20:44:54,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:54,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544916964] [2023-02-15 20:44:54,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544916964] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:54,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:54,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2023-02-15 20:44:54,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161655477] [2023-02-15 20:44:54,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:54,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 20:44:54,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 20:44:54,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:44:54,059 INFO L87 Difference]: Start difference. First operand 1876 states and 2579 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 20:44:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:54,867 INFO L93 Difference]: Finished difference Result 2904 states and 4177 transitions. [2023-02-15 20:44:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 20:44:54,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2023-02-15 20:44:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:54,875 INFO L225 Difference]: With dead ends: 2904 [2023-02-15 20:44:54,876 INFO L226 Difference]: Without dead ends: 2872 [2023-02-15 20:44:54,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:44:54,877 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 112 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:54,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 387 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:44:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2023-02-15 20:44:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2056. [2023-02-15 20:44:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 1524 states have (on average 1.3169291338582678) internal successors, (2007), 1573 states have internal predecessors, (2007), 427 states have call successors, (427), 104 states have call predecessors, (427), 104 states have return successors, (419), 378 states have call predecessors, (419), 419 states have call successors, (419) [2023-02-15 20:44:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2853 transitions. [2023-02-15 20:44:55,282 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2853 transitions. Word has length 61 [2023-02-15 20:44:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:55,283 INFO L495 AbstractCegarLoop]: Abstraction has 2056 states and 2853 transitions. [2023-02-15 20:44:55,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 20:44:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2853 transitions. [2023-02-15 20:44:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 20:44:55,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:55,284 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:55,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-15 20:44:55,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:55,488 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:55,489 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 1 times [2023-02-15 20:44:55,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:55,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475196091] [2023-02-15 20:44:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:55,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:55,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:55,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344177145] [2023-02-15 20:44:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:55,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:55,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:55,526 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:55,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 20:44:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 20:44:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 20:44:55,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:44:55,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:55,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475196091] [2023-02-15 20:44:55,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:55,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344177145] [2023-02-15 20:44:55,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344177145] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:44:55,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:44:55,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:44:55,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882212171] [2023-02-15 20:44:55,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:44:55,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:44:55,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:55,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:44:55,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:44:55,594 INFO L87 Difference]: Start difference. First operand 2056 states and 2853 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 20:44:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:56,148 INFO L93 Difference]: Finished difference Result 3737 states and 5268 transitions. [2023-02-15 20:44:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:44:56,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2023-02-15 20:44:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:56,155 INFO L225 Difference]: With dead ends: 3737 [2023-02-15 20:44:56,155 INFO L226 Difference]: Without dead ends: 2429 [2023-02-15 20:44:56,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:44:56,157 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:56,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:44:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2023-02-15 20:44:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2270. [2023-02-15 20:44:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 1637 states have (on average 1.31459987782529) internal successors, (2152), 1686 states have internal predecessors, (2152), 528 states have call successors, (528), 104 states have call predecessors, (528), 104 states have return successors, (520), 479 states have call predecessors, (520), 520 states have call successors, (520) [2023-02-15 20:44:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3200 transitions. [2023-02-15 20:44:56,621 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3200 transitions. Word has length 69 [2023-02-15 20:44:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:56,622 INFO L495 AbstractCegarLoop]: Abstraction has 2270 states and 3200 transitions. [2023-02-15 20:44:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 20:44:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3200 transitions. [2023-02-15 20:44:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 20:44:56,623 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:56,623 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:56,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:56,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:56,828 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:56,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 2 times [2023-02-15 20:44:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:56,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059603695] [2023-02-15 20:44:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:56,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:56,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314795239] [2023-02-15 20:44:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:44:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:56,835 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:56,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 20:44:56,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:44:56,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:44:56,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-15 20:44:56,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 20:44:57,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 20:44:59,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:59,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059603695] [2023-02-15 20:44:59,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:59,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314795239] [2023-02-15 20:44:59,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314795239] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:59,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:59,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-02-15 20:44:59,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283683011] [2023-02-15 20:44:59,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:59,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 20:44:59,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:59,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 20:44:59,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2023-02-15 20:44:59,288 INFO L87 Difference]: Start difference. First operand 2270 states and 3200 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 28 states have internal predecessors, (81), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2023-02-15 20:45:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:45:28,904 INFO L93 Difference]: Finished difference Result 3273 states and 4536 transitions. [2023-02-15 20:45:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 20:45:28,904 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 28 states have internal predecessors, (81), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 71 [2023-02-15 20:45:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:45:28,938 INFO L225 Difference]: With dead ends: 3273 [2023-02-15 20:45:28,938 INFO L226 Difference]: Without dead ends: 3265 [2023-02-15 20:45:28,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=913, Invalid=3509, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 20:45:28,941 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 482 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-02-15 20:45:28,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 664 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-02-15 20:45:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2023-02-15 20:45:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 2801. [2023-02-15 20:45:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2111 states have (on average 1.3074372335386073) internal successors, (2760), 2167 states have internal predecessors, (2760), 554 states have call successors, (554), 136 states have call predecessors, (554), 135 states have return successors, (548), 497 states have call predecessors, (548), 548 states have call successors, (548) [2023-02-15 20:45:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 3862 transitions. [2023-02-15 20:45:29,756 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 3862 transitions. Word has length 71 [2023-02-15 20:45:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:45:29,756 INFO L495 AbstractCegarLoop]: Abstraction has 2801 states and 3862 transitions. [2023-02-15 20:45:29,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 28 states have internal predecessors, (81), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2023-02-15 20:45:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 3862 transitions. [2023-02-15 20:45:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-15 20:45:29,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:45:29,761 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:45:29,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 20:45:29,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:45:29,967 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:45:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:45:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2023-02-15 20:45:29,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:45:29,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95985527] [2023-02-15 20:45:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:45:29,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:45:29,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:45:29,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967600595] [2023-02-15 20:45:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:45:29,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:45:29,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:45:29,981 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:45:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 20:45:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:45:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-15 20:45:30,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:45:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-15 20:45:30,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:45:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-15 20:45:37,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:45:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95985527] [2023-02-15 20:45:37,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:45:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967600595] [2023-02-15 20:45:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967600595] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:45:37,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:45:37,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-02-15 20:45:37,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595567264] [2023-02-15 20:45:37,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:45:37,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 20:45:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:45:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 20:45:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 20:45:37,786 INFO L87 Difference]: Start difference. First operand 2801 states and 3862 transitions. Second operand has 34 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 10 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-15 20:45:49,321 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 [] [2023-02-15 20:45:54,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:46:11,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:46:17,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:46:29,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:46:39,646 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 [] [2023-02-15 20:46:41,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:41,032 INFO L93 Difference]: Finished difference Result 4412 states and 6160 transitions. [2023-02-15 20:46:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-15 20:46:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 10 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 84 [2023-02-15 20:46:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:41,044 INFO L225 Difference]: With dead ends: 4412 [2023-02-15 20:46:41,044 INFO L226 Difference]: Without dead ends: 4381 [2023-02-15 20:46:41,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3852 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=2346, Invalid=9426, Unknown=0, NotChecked=0, Total=11772 [2023-02-15 20:46:41,055 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 615 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 615 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 3201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:41,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1058 Invalid, 3201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 2580 Invalid, 6 Unknown, 0 Unchecked, 31.3s Time] [2023-02-15 20:46:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2023-02-15 20:46:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3789. [2023-02-15 20:46:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 2946 states have (on average 1.327223353699932) internal successors, (3910), 3019 states have internal predecessors, (3910), 691 states have call successors, (691), 152 states have call predecessors, (691), 151 states have return successors, (685), 617 states have call predecessors, (685), 685 states have call successors, (685) [2023-02-15 20:46:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 5286 transitions. [2023-02-15 20:46:42,799 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 5286 transitions. Word has length 84 [2023-02-15 20:46:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:42,799 INFO L495 AbstractCegarLoop]: Abstraction has 3789 states and 5286 transitions. [2023-02-15 20:46:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 10 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-15 20:46:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 5286 transitions. [2023-02-15 20:46:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-15 20:46:42,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:42,801 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:42,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 20:46:43,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:43,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash 73331439, now seen corresponding path program 1 times [2023-02-15 20:46:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:43,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208864587] [2023-02-15 20:46:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:43,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:43,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593322838] [2023-02-15 20:46:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:43,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:43,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:43,018 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:46:43,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 20:46:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:43,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 20:46:43,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 44 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 20:46:43,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 44 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-15 20:46:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208864587] [2023-02-15 20:46:43,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:43,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593322838] [2023-02-15 20:46:43,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593322838] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:43,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:43,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-02-15 20:46:43,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164042445] [2023-02-15 20:46:43,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:43,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:46:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:46:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:46:43,342 INFO L87 Difference]: Start difference. First operand 3789 states and 5286 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 20:46:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:46,160 INFO L93 Difference]: Finished difference Result 6966 states and 9978 transitions. [2023-02-15 20:46:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 20:46:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 95 [2023-02-15 20:46:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:46,174 INFO L225 Difference]: With dead ends: 6966 [2023-02-15 20:46:46,174 INFO L226 Difference]: Without dead ends: 5065 [2023-02-15 20:46:46,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=473, Invalid=859, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 20:46:46,178 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 355 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:46,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 643 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:46:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2023-02-15 20:46:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 4829. [2023-02-15 20:46:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 3535 states have (on average 1.308062234794908) internal successors, (4624), 3604 states have internal predecessors, (4624), 1071 states have call successors, (1071), 223 states have call predecessors, (1071), 222 states have return successors, (1061), 1001 states have call predecessors, (1061), 1061 states have call successors, (1061) [2023-02-15 20:46:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 6756 transitions. [2023-02-15 20:46:48,581 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 6756 transitions. Word has length 95 [2023-02-15 20:46:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:48,581 INFO L495 AbstractCegarLoop]: Abstraction has 4829 states and 6756 transitions. [2023-02-15 20:46:48,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 20:46:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 6756 transitions. [2023-02-15 20:46:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-15 20:46:48,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:48,583 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:48,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-15 20:46:48,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:48,788 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash -737280076, now seen corresponding path program 2 times [2023-02-15 20:46:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:48,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571737939] [2023-02-15 20:46:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:48,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:48,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745163140] [2023-02-15 20:46:48,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:46:48,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:48,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:48,802 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:46:48,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 20:46:48,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:46:48,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:46:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 20:46:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-15 20:46:49,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-02-15 20:46:55,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:55,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571737939] [2023-02-15 20:46:55,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:55,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745163140] [2023-02-15 20:46:55,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745163140] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:55,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:55,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-02-15 20:46:55,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923060629] [2023-02-15 20:46:55,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:55,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 20:46:55,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 20:46:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:46:55,193 INFO L87 Difference]: Start difference. First operand 4829 states and 6756 transitions. Second operand has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2023-02-15 20:47:03,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:47:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:47:58,728 INFO L93 Difference]: Finished difference Result 7675 states and 10802 transitions. [2023-02-15 20:47:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-15 20:47:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 104 [2023-02-15 20:47:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:47:58,739 INFO L225 Difference]: With dead ends: 7675 [2023-02-15 20:47:58,740 INFO L226 Difference]: Without dead ends: 5818 [2023-02-15 20:47:58,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3488 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=1991, Invalid=9139, Unknown=0, NotChecked=0, Total=11130 [2023-02-15 20:47:58,746 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 430 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:47:58,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1490 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2023-02-15 20:47:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2023-02-15 20:48:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 5080. [2023-02-15 20:48:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5080 states, 3688 states have (on average 1.3074837310195229) internal successors, (4822), 3757 states have internal predecessors, (4822), 1150 states have call successors, (1150), 241 states have call predecessors, (1150), 241 states have return successors, (1141), 1081 states have call predecessors, (1141), 1141 states have call successors, (1141) [2023-02-15 20:48:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 7113 transitions. [2023-02-15 20:48:01,523 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 7113 transitions. Word has length 104 [2023-02-15 20:48:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:01,523 INFO L495 AbstractCegarLoop]: Abstraction has 5080 states and 7113 transitions. [2023-02-15 20:48:01,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2023-02-15 20:48:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 7113 transitions. [2023-02-15 20:48:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-15 20:48:01,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:01,525 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:01,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:01,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:01,729 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1018938325, now seen corresponding path program 1 times [2023-02-15 20:48:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:01,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207800358] [2023-02-15 20:48:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:01,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890512518] [2023-02-15 20:48:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:01,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:01,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:01,737 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:01,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 20:48:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:01,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:48:01,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 116 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 20:48:01,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 52 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-02-15 20:48:02,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:02,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207800358] [2023-02-15 20:48:02,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:02,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890512518] [2023-02-15 20:48:02,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890512518] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:02,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:02,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-15 20:48:02,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914287743] [2023-02-15 20:48:02,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:02,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 20:48:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 20:48:02,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-15 20:48:02,151 INFO L87 Difference]: Start difference. First operand 5080 states and 7113 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 20:48:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:06,378 INFO L93 Difference]: Finished difference Result 9739 states and 13826 transitions. [2023-02-15 20:48:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 20:48:06,379 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 106 [2023-02-15 20:48:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:06,433 INFO L225 Difference]: With dead ends: 9739 [2023-02-15 20:48:06,434 INFO L226 Difference]: Without dead ends: 6682 [2023-02-15 20:48:06,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:48:06,443 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 587 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:06,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 621 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:48:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2023-02-15 20:48:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6509. [2023-02-15 20:48:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 4649 states have (on average 1.2637126263712626) internal successors, (5875), 4712 states have internal predecessors, (5875), 1542 states have call successors, (1542), 317 states have call predecessors, (1542), 317 states have return successors, (1529), 1479 states have call predecessors, (1529), 1529 states have call successors, (1529) [2023-02-15 20:48:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 8946 transitions. [2023-02-15 20:48:10,150 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 8946 transitions. Word has length 106 [2023-02-15 20:48:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:10,151 INFO L495 AbstractCegarLoop]: Abstraction has 6509 states and 8946 transitions. [2023-02-15 20:48:10,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 20:48:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 8946 transitions. [2023-02-15 20:48:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-15 20:48:10,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:10,153 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:10,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:10,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 20:48:10,358 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2136870997, now seen corresponding path program 1 times [2023-02-15 20:48:10,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:10,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539224360] [2023-02-15 20:48:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:10,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:10,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:10,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78833863] [2023-02-15 20:48:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:10,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:10,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:10,372 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:10,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 20:48:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 20:48:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2023-02-15 20:48:10,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 63 proven. 17 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-02-15 20:48:11,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539224360] [2023-02-15 20:48:11,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78833863] [2023-02-15 20:48:11,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78833863] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:11,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:11,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-02-15 20:48:11,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327984290] [2023-02-15 20:48:11,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:11,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:48:11,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:48:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:48:11,073 INFO L87 Difference]: Start difference. First operand 6509 states and 8946 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-15 20:48:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:19,875 INFO L93 Difference]: Finished difference Result 14191 states and 20268 transitions. [2023-02-15 20:48:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:48:19,876 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 119 [2023-02-15 20:48:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:19,924 INFO L225 Difference]: With dead ends: 14191 [2023-02-15 20:48:19,940 INFO L226 Difference]: Without dead ends: 10296 [2023-02-15 20:48:19,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=422, Invalid=1740, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:48:19,948 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 254 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:19,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 860 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 20:48:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10296 states. [2023-02-15 20:48:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10296 to 9715. [2023-02-15 20:48:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9715 states, 6298 states have (on average 1.2772308669418864) internal successors, (8044), 6370 states have internal predecessors, (8044), 3060 states have call successors, (3060), 357 states have call predecessors, (3060), 356 states have return successors, (3048), 2987 states have call predecessors, (3048), 3048 states have call successors, (3048) [2023-02-15 20:48:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9715 states to 9715 states and 14152 transitions. [2023-02-15 20:48:26,935 INFO L78 Accepts]: Start accepts. Automaton has 9715 states and 14152 transitions. Word has length 119 [2023-02-15 20:48:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:26,935 INFO L495 AbstractCegarLoop]: Abstraction has 9715 states and 14152 transitions. [2023-02-15 20:48:26,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-15 20:48:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 9715 states and 14152 transitions. [2023-02-15 20:48:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 20:48:26,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:26,938 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:26,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:27,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 20:48:27,143 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash 848821564, now seen corresponding path program 2 times [2023-02-15 20:48:27,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:27,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077097098] [2023-02-15 20:48:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:27,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:27,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:27,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369369782] [2023-02-15 20:48:27,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:48:27,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:27,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:27,170 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:48:27,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 20:48:27,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:48:27,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 20:48:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 29 proven. 74 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-02-15 20:48:28,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 26 proven. 67 refuted. 7 times theorem prover too weak. 316 trivial. 0 not checked. [2023-02-15 20:48:34,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:34,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077097098] [2023-02-15 20:48:34,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:34,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369369782] [2023-02-15 20:48:34,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369369782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:34,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:34,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2023-02-15 20:48:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725807474] [2023-02-15 20:48:34,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:34,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 20:48:34,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 20:48:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=898, Unknown=1, NotChecked=0, Total=1056 [2023-02-15 20:48:34,560 INFO L87 Difference]: Start difference. First operand 9715 states and 14152 transitions. Second operand has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 30 states have internal predecessors, (96), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-02-15 20:48:45,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:48:48,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:48:50,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:48:52,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []