./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/cohencu-ll_valuebound50.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 0bcbcb4a55258889434b8bf703da9ec6fb29d07a2fbacad968a5ab15e005b314 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 11:54:21,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 11:54:21,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 11:54:21,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 11:54:21,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 11:54:21,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 11:54:21,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 11:54:21,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 11:54:21,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 11:54:21,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 11:54:21,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 11:54:21,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 11:54:21,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 11:54:21,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 11:54:21,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 11:54:21,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 11:54:21,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 11:54:21,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 11:54:21,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 11:54:21,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 11:54:21,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 11:54:21,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 11:54:21,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 11:54:21,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 11:54:22,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 11:54:22,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 11:54:22,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 11:54:22,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 11:54:22,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 11:54:22,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 11:54:22,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 11:54:22,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 11:54:22,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 11:54:22,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 11:54:22,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 11:54:22,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 11:54:22,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 11:54:22,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 11:54:22,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 11:54:22,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 11:54:22,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 11:54:22,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 11:54:22,037 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 11:54:22,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 11:54:22,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 11:54:22,038 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 11:54:22,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 11:54:22,039 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 11:54:22,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 11:54:22,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 11:54:22,040 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 11:54:22,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 11:54:22,040 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 11:54:22,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 11:54:22,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 11:54:22,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 11:54:22,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 11:54:22,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 11:54:22,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 11:54:22,042 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 11:54:22,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 11:54:22,042 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 11:54:22,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 11:54:22,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 11:54:22,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 11:54:22,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 11:54:22,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:54:22,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 11:54:22,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 11:54:22,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 11:54:22,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 11:54:22,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 11:54:22,044 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 11:54:22,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 11:54:22,044 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 11:54:22,044 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 11:54:22,045 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 11:54:22,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bcbcb4a55258889434b8bf703da9ec6fb29d07a2fbacad968a5ab15e005b314 [2023-02-14 11:54:22,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 11:54:22,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 11:54:22,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 11:54:22,254 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 11:54:22,254 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 11:54:22,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2023-02-14 11:54:23,220 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 11:54:23,331 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 11:54:23,331 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2023-02-14 11:54:23,335 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178c319da/b74e01e714cf49d880d5fad29a046ce0/FLAG13945585d [2023-02-14 11:54:23,350 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178c319da/b74e01e714cf49d880d5fad29a046ce0 [2023-02-14 11:54:23,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 11:54:23,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 11:54:23,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 11:54:23,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 11:54:23,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 11:54:23,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b8dd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23, skipping insertion in model container [2023-02-14 11:54:23,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 11:54:23,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 11:54:23,466 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/cohencu-ll_valuebound50.c[588,601] [2023-02-14 11:54:23,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:54:23,484 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 11:54:23,492 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/cohencu-ll_valuebound50.c[588,601] [2023-02-14 11:54:23,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:54:23,506 INFO L208 MainTranslator]: Completed translation [2023-02-14 11:54:23,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23 WrapperNode [2023-02-14 11:54:23,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 11:54:23,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 11:54:23,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 11:54:23,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 11:54:23,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,528 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2023-02-14 11:54:23,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 11:54:23,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 11:54:23,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 11:54:23,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 11:54:23,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 11:54:23,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 11:54:23,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 11:54:23,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 11:54:23,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (1/1) ... [2023-02-14 11:54:23,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:54:23,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:23,574 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) [2023-02-14 11:54:23,581 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 [2023-02-14 11:54:23,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 11:54:23,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 11:54:23,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 11:54:23,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 11:54:23,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 11:54:23,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 11:54:23,640 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 11:54:23,641 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 11:54:23,740 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 11:54:23,744 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 11:54:23,745 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 11:54:23,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:54:23 BoogieIcfgContainer [2023-02-14 11:54:23,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 11:54:23,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 11:54:23,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 11:54:23,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 11:54:23,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:54:23" (1/3) ... [2023-02-14 11:54:23,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68204dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:54:23, skipping insertion in model container [2023-02-14 11:54:23,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:54:23" (2/3) ... [2023-02-14 11:54:23,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68204dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:54:23, skipping insertion in model container [2023-02-14 11:54:23,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:54:23" (3/3) ... [2023-02-14 11:54:23,752 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.c [2023-02-14 11:54:23,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 11:54:23,764 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 11:54:23,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 11:54:23,798 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;@320effe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 11:54:23,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 11:54:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 11:54:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 11:54:23,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:23,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:23,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:23,810 INFO L85 PathProgramCache]: Analyzing trace with hash -588951690, now seen corresponding path program 1 times [2023-02-14 11:54:23,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:23,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832481275] [2023-02-14 11:54:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:23,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:54:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:54:23,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:23,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832481275] [2023-02-14 11:54:23,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832481275] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:54:23,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:54:23,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 11:54:23,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001190366] [2023-02-14 11:54:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:54:23,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 11:54:23,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:23,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 11:54:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:54:23,948 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:54:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:23,972 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2023-02-14 11:54:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 11:54:23,975 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 11:54:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:23,979 INFO L225 Difference]: With dead ends: 51 [2023-02-14 11:54:23,979 INFO L226 Difference]: Without dead ends: 23 [2023-02-14 11:54:23,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:54:23,987 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2023-02-14 11:54:23,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:54:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-14 11:54:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-14 11:54:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 11:54:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2023-02-14 11:54:24,021 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2023-02-14 11:54:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:24,022 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2023-02-14 11:54:24,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:54:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2023-02-14 11:54:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 11:54:24,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:24,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:24,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 11:54:24,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1187604804, now seen corresponding path program 1 times [2023-02-14 11:54:24,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:24,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533000146] [2023-02-14 11:54:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:24,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:54:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:54:24,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:24,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533000146] [2023-02-14 11:54:24,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533000146] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:54:24,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:54:24,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 11:54:24,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752531407] [2023-02-14 11:54:24,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:54:24,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:54:24,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:24,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:54:24,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 11:54:24,203 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:54:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:24,279 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-02-14 11:54:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:54:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 11:54:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:24,280 INFO L225 Difference]: With dead ends: 29 [2023-02-14 11:54:24,280 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 11:54:24,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 11:54:24,281 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:24,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 63 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:54:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 11:54:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-14 11:54:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 11:54:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-02-14 11:54:24,290 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2023-02-14 11:54:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:24,291 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-02-14 11:54:24,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:54:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-02-14 11:54:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 11:54:24,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:24,292 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:24,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 11:54:24,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:24,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1137950087, now seen corresponding path program 1 times [2023-02-14 11:54:24,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:24,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478408091] [2023-02-14 11:54:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:24,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:24,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:24,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759495667] [2023-02-14 11:54:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:24,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:24,316 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) [2023-02-14 11:54:24,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 11:54:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:54:24,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 11:54:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:54:24,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:54:24,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:24,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478408091] [2023-02-14 11:54:24,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:24,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759495667] [2023-02-14 11:54:24,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759495667] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:24,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:24,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 11:54:24,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066715810] [2023-02-14 11:54:24,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:24,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 11:54:24,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 11:54:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:54:24,677 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:54:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:25,025 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2023-02-14 11:54:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 11:54:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-02-14 11:54:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:25,027 INFO L225 Difference]: With dead ends: 52 [2023-02-14 11:54:25,027 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 11:54:25,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:54:25,028 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:25,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:54:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 11:54:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2023-02-14 11:54:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-14 11:54:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2023-02-14 11:54:25,041 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 14 [2023-02-14 11:54:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:25,042 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2023-02-14 11:54:25,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:54:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2023-02-14 11:54:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 11:54:25,042 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:25,043 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:25,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 11:54:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:25,249 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1500531996, now seen corresponding path program 1 times [2023-02-14 11:54:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:25,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916268345] [2023-02-14 11:54:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:25,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:25,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:25,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389921922] [2023-02-14 11:54:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:25,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:25,283 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) [2023-02-14 11:54:25,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 11:54:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:54:25,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 11:54:25,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:54:25,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:54:25,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:25,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916268345] [2023-02-14 11:54:25,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389921922] [2023-02-14 11:54:25,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389921922] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:25,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:25,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 11:54:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774380891] [2023-02-14 11:54:25,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:25,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 11:54:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 11:54:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:54:25,487 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 11:54:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:25,659 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-02-14 11:54:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 11:54:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 19 [2023-02-14 11:54:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:25,660 INFO L225 Difference]: With dead ends: 54 [2023-02-14 11:54:25,660 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 11:54:25,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:54:25,661 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:25,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:54:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 11:54:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-14 11:54:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-14 11:54:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-02-14 11:54:25,672 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 19 [2023-02-14 11:54:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:25,672 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-02-14 11:54:25,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 11:54:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-02-14 11:54:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 11:54:25,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:25,673 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:25,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 11:54:25,881 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,SelfDestructingSolverStorable3 [2023-02-14 11:54:25,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1926539111, now seen corresponding path program 1 times [2023-02-14 11:54:25,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:25,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122655141] [2023-02-14 11:54:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:25,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828115899] [2023-02-14 11:54:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:25,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:25,903 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) [2023-02-14 11:54:25,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 11:54:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:54:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 11:54:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:54:26,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:54:26,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:26,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122655141] [2023-02-14 11:54:26,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:26,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828115899] [2023-02-14 11:54:26,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828115899] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:26,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:26,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 11:54:26,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709510829] [2023-02-14 11:54:26,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:26,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 11:54:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:26,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 11:54:26,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:54:26,348 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 11:54:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:27,304 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2023-02-14 11:54:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 11:54:27,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2023-02-14 11:54:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:27,306 INFO L225 Difference]: With dead ends: 67 [2023-02-14 11:54:27,307 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 11:54:27,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:54:27,309 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:27,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 11:54:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 11:54:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-14 11:54:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.064516129032258) internal successors, (33), 33 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-14 11:54:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-02-14 11:54:27,333 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 24 [2023-02-14 11:54:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:27,333 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-02-14 11:54:27,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 11:54:27,334 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-02-14 11:54:27,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 11:54:27,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:27,335 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:27,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 11:54:27,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:27,539 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1495173479, now seen corresponding path program 1 times [2023-02-14 11:54:27,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:27,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834989112] [2023-02-14 11:54:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:27,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:27,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:27,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842140489] [2023-02-14 11:54:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:27,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:27,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:27,549 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) [2023-02-14 11:54:27,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 11:54:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:54:27,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 11:54:27,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 11:54:27,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 11:54:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834989112] [2023-02-14 11:54:27,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842140489] [2023-02-14 11:54:27,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842140489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:27,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:27,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-14 11:54:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910812217] [2023-02-14 11:54:27,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:27,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:54:27,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:54:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:54:27,772 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-14 11:54:30,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:54:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:30,462 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2023-02-14 11:54:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 11:54:30,463 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-02-14 11:54:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:30,464 INFO L225 Difference]: With dead ends: 82 [2023-02-14 11:54:30,464 INFO L226 Difference]: Without dead ends: 80 [2023-02-14 11:54:30,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:54:30,465 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:30,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 62 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 281 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-02-14 11:54:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-14 11:54:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2023-02-14 11:54:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 45 states have internal predecessors, (45), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-14 11:54:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2023-02-14 11:54:30,483 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 46 [2023-02-14 11:54:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:30,484 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2023-02-14 11:54:30,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-14 11:54:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2023-02-14 11:54:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 11:54:30,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:30,485 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:30,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 11:54:30,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:30,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1498221753, now seen corresponding path program 2 times [2023-02-14 11:54:30,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:30,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048070601] [2023-02-14 11:54:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:30,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:30,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:30,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629638308] [2023-02-14 11:54:30,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:54:30,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:30,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:30,699 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) [2023-02-14 11:54:30,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 11:54:30,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:54:30,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:54:30,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 11:54:30,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 11:54:30,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-14 11:54:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:30,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048070601] [2023-02-14 11:54:30,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:30,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629638308] [2023-02-14 11:54:30,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629638308] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:30,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:30,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 11:54:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391347615] [2023-02-14 11:54:30,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:30,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 11:54:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 11:54:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:54:30,944 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-14 11:54:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:31,566 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2023-02-14 11:54:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 11:54:31,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 56 [2023-02-14 11:54:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:31,568 INFO L225 Difference]: With dead ends: 86 [2023-02-14 11:54:31,568 INFO L226 Difference]: Without dead ends: 81 [2023-02-14 11:54:31,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:54:31,569 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:31,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 88 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 11:54:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-14 11:54:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-14 11:54:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 48 states have internal predecessors, (48), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-14 11:54:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2023-02-14 11:54:31,583 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 56 [2023-02-14 11:54:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:31,583 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2023-02-14 11:54:31,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-14 11:54:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2023-02-14 11:54:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 11:54:31,585 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:31,585 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:31,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 11:54:31,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:31,789 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1061977627, now seen corresponding path program 1 times [2023-02-14 11:54:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:31,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263787870] [2023-02-14 11:54:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:31,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:31,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110863981] [2023-02-14 11:54:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:31,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:31,798 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) [2023-02-14 11:54:31,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 11:54:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:54:31,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 11:54:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-14 11:54:32,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-14 11:54:32,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:32,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263787870] [2023-02-14 11:54:32,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:32,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110863981] [2023-02-14 11:54:32,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110863981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:32,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:32,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-02-14 11:54:32,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624554984] [2023-02-14 11:54:32,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:32,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:54:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:32,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:54:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:54:32,163 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-14 11:54:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:32,714 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2023-02-14 11:54:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 11:54:32,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 67 [2023-02-14 11:54:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:32,716 INFO L225 Difference]: With dead ends: 95 [2023-02-14 11:54:32,716 INFO L226 Difference]: Without dead ends: 93 [2023-02-14 11:54:32,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-02-14 11:54:32,717 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 30 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:32,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 150 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:54:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-14 11:54:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2023-02-14 11:54:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 52 states have internal predecessors, (53), 29 states have call successors, (29), 12 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-14 11:54:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2023-02-14 11:54:32,756 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 67 [2023-02-14 11:54:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:32,757 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2023-02-14 11:54:32,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-14 11:54:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2023-02-14 11:54:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 11:54:32,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:32,759 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:32,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 11:54:32,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:32,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:32,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1246911088, now seen corresponding path program 1 times [2023-02-14 11:54:32,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:32,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092242506] [2023-02-14 11:54:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:32,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:32,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:32,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603206132] [2023-02-14 11:54:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:32,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:32,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:32,974 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) [2023-02-14 11:54:32,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 11:54:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:54:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 11:54:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-14 11:54:33,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:33,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092242506] [2023-02-14 11:54:33,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:33,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603206132] [2023-02-14 11:54:33,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603206132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:54:33,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:54:33,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-14 11:54:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307495988] [2023-02-14 11:54:33,289 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:33,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 11:54:33,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 11:54:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:54:33,291 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 11:54:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:33,502 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2023-02-14 11:54:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 11:54:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72 [2023-02-14 11:54:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:33,503 INFO L225 Difference]: With dead ends: 97 [2023-02-14 11:54:33,503 INFO L226 Difference]: Without dead ends: 88 [2023-02-14 11:54:33,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:54:33,504 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:33,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:54:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-14 11:54:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-14 11:54:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-14 11:54:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2023-02-14 11:54:33,522 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 72 [2023-02-14 11:54:33,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:33,522 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2023-02-14 11:54:33,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 11:54:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2023-02-14 11:54:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-14 11:54:33,523 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:33,523 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:33,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 11:54:33,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:33,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:33,733 INFO L85 PathProgramCache]: Analyzing trace with hash -322800313, now seen corresponding path program 3 times [2023-02-14 11:54:33,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:33,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14764376] [2023-02-14 11:54:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:33,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:33,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:33,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922676] [2023-02-14 11:54:33,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:54:33,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:33,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:33,740 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) [2023-02-14 11:54:33,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 11:54:33,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 11:54:33,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:54:33,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 11:54:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-14 11:54:33,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-14 11:54:34,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14764376] [2023-02-14 11:54:34,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922676] [2023-02-14 11:54:34,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:34,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:34,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-14 11:54:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075932706] [2023-02-14 11:54:34,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:34,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 11:54:34,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 11:54:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-02-14 11:54:34,401 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 11:54:38,506 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 [] [2023-02-14 11:54:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:38,526 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2023-02-14 11:54:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 11:54:38,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 78 [2023-02-14 11:54:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:38,527 INFO L225 Difference]: With dead ends: 110 [2023-02-14 11:54:38,527 INFO L226 Difference]: Without dead ends: 107 [2023-02-14 11:54:38,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-02-14 11:54:38,529 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 75 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:38,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 84 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 399 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-02-14 11:54:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-14 11:54:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-02-14 11:54:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-14 11:54:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2023-02-14 11:54:38,552 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 78 [2023-02-14 11:54:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:38,552 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2023-02-14 11:54:38,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 11:54:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2023-02-14 11:54:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-14 11:54:38,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:38,557 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:38,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 11:54:38,757 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,SelfDestructingSolverStorable9 [2023-02-14 11:54:38,758 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash -674604307, now seen corresponding path program 2 times [2023-02-14 11:54:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:38,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215786700] [2023-02-14 11:54:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:38,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:38,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:38,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778949568] [2023-02-14 11:54:38,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:54:38,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:38,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:38,769 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) [2023-02-14 11:54:38,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 11:54:38,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:54:38,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:54:38,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 11:54:38,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 78 proven. 25 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-14 11:54:39,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:39,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:39,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215786700] [2023-02-14 11:54:39,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:39,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778949568] [2023-02-14 11:54:39,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778949568] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:54:39,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:54:39,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-14 11:54:39,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687328884] [2023-02-14 11:54:39,893 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:39,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 11:54:39,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:39,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 11:54:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:54:39,894 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2023-02-14 11:54:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:40,307 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2023-02-14 11:54:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 11:54:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 99 [2023-02-14 11:54:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:40,308 INFO L225 Difference]: With dead ends: 111 [2023-02-14 11:54:40,308 INFO L226 Difference]: Without dead ends: 98 [2023-02-14 11:54:40,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:54:40,308 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:40,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 88 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:54:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-14 11:54:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-02-14 11:54:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 24 states have call successors, (24), 15 states have call predecessors, (24), 15 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 11:54:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2023-02-14 11:54:40,333 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 99 [2023-02-14 11:54:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:40,334 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2023-02-14 11:54:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2023-02-14 11:54:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2023-02-14 11:54:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-14 11:54:40,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:40,335 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:40,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 11:54:40,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:40,537 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1837317061, now seen corresponding path program 2 times [2023-02-14 11:54:40,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:40,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085998684] [2023-02-14 11:54:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:40,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:40,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:40,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105028699] [2023-02-14 11:54:40,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:54:40,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:40,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:40,545 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) [2023-02-14 11:54:40,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 11:54:40,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:54:40,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:54:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-14 11:54:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 101 proven. 43 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-02-14 11:54:40,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2023-02-14 11:54:42,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:42,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085998684] [2023-02-14 11:54:42,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:42,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105028699] [2023-02-14 11:54:42,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105028699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:42,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:42,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-02-14 11:54:42,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073152088] [2023-02-14 11:54:42,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:42,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 11:54:42,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:42,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 11:54:42,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:54:42,789 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-14 11:54:46,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:54:46,204 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2023-02-14 11:54:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:54:46,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 121 [2023-02-14 11:54:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:54:46,206 INFO L225 Difference]: With dead ends: 127 [2023-02-14 11:54:46,206 INFO L226 Difference]: Without dead ends: 125 [2023-02-14 11:54:46,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-02-14 11:54:46,207 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:54:46,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-02-14 11:54:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-14 11:54:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2023-02-14 11:54:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 24 states have call successors, (24), 17 states have call predecessors, (24), 17 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 11:54:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2023-02-14 11:54:46,234 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 121 [2023-02-14 11:54:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:54:46,234 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2023-02-14 11:54:46,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-14 11:54:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2023-02-14 11:54:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-14 11:54:46,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:54:46,235 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:54:46,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 11:54:46,440 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,SelfDestructingSolverStorable11 [2023-02-14 11:54:46,441 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:54:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:54:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1974193296, now seen corresponding path program 3 times [2023-02-14 11:54:46,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:54:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019053126] [2023-02-14 11:54:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:54:46,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:54:46,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:54:46,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253888856] [2023-02-14 11:54:46,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:54:46,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:54:46,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:54:46,449 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) [2023-02-14 11:54:46,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 11:54:47,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 11:54:47,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:54:47,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-14 11:54:47,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:54:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-02-14 11:54:55,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:54:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-02-14 11:54:58,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:54:58,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019053126] [2023-02-14 11:54:58,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:54:58,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253888856] [2023-02-14 11:54:58,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253888856] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:54:58,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:54:58,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2023-02-14 11:54:58,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052855566] [2023-02-14 11:54:58,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:54:58,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 11:54:58,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:54:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 11:54:58,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-02-14 11:54:58,266 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2023-02-14 11:55:02,267 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 [] [2023-02-14 11:55:03,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:55:06,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:55:07,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:55:09,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:55:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:55:10,050 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2023-02-14 11:55:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 11:55:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) Word has length 126 [2023-02-14 11:55:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:55:10,051 INFO L225 Difference]: With dead ends: 112 [2023-02-14 11:55:10,051 INFO L226 Difference]: Without dead ends: 108 [2023-02-14 11:55:10,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-02-14 11:55:10,052 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 76 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:55:10,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 54 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 204 Invalid, 2 Unknown, 0 Unchecked, 10.4s Time] [2023-02-14 11:55:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-14 11:55:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-02-14 11:55:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 24 states have call successors, (24), 18 states have call predecessors, (24), 17 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 11:55:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2023-02-14 11:55:10,073 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 126 [2023-02-14 11:55:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:55:10,074 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2023-02-14 11:55:10,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2023-02-14 11:55:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2023-02-14 11:55:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-14 11:55:10,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:55:10,076 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:55:10,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 11:55:10,282 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,SelfDestructingSolverStorable12 [2023-02-14 11:55:10,283 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:55:10,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:55:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1520954085, now seen corresponding path program 1 times [2023-02-14 11:55:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:55:10,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614944857] [2023-02-14 11:55:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:55:10,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:55:10,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:55:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433662734] [2023-02-14 11:55:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:55:10,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:55:10,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:55:10,293 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) [2023-02-14 11:55:10,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 11:55:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:55:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-14 11:55:10,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:55:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 104 proven. 110 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-02-14 11:55:11,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:55:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 104 proven. 110 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-02-14 11:55:23,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:55:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614944857] [2023-02-14 11:55:23,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:55:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433662734] [2023-02-14 11:55:23,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433662734] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:55:23,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:55:23,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-02-14 11:55:23,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664384193] [2023-02-14 11:55:23,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:55:23,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 11:55:23,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:55:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 11:55:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=298, Unknown=3, NotChecked=0, Total=380 [2023-02-14 11:55:23,279 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) [2023-02-14 11:55:59,331 WARN L233 SmtUtils]: Spent 34.76s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:56:02,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:56:04,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:56:06,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:56:08,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:56:15,890 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:56:21,918 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:56:25,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:56:54,329 WARN L233 SmtUtils]: Spent 28.89s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:56:59,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:57:02,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:57:04,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:57:05,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:57:09,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:57:11,308 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 [] [2023-02-14 11:57:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:57:17,711 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2023-02-14 11:57:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 11:57:17,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) Word has length 131 [2023-02-14 11:57:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:57:17,712 INFO L225 Difference]: With dead ends: 163 [2023-02-14 11:57:17,712 INFO L226 Difference]: Without dead ends: 151 [2023-02-14 11:57:17,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 90.6s TimeCoverageRelationStatistics Valid=175, Invalid=578, Unknown=3, NotChecked=0, Total=756 [2023-02-14 11:57:17,713 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 102 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:57:17,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 117 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 817 Invalid, 9 Unknown, 0 Unchecked, 31.5s Time] [2023-02-14 11:57:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-14 11:57:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-02-14 11:57:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-14 11:57:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2023-02-14 11:57:17,768 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 131 [2023-02-14 11:57:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:57:17,768 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2023-02-14 11:57:17,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) [2023-02-14 11:57:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2023-02-14 11:57:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-14 11:57:17,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:57:17,770 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:57:17,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 11:57:17,974 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,SelfDestructingSolverStorable13 [2023-02-14 11:57:17,974 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:57:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:57:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1512061602, now seen corresponding path program 2 times [2023-02-14 11:57:17,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:57:17,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680532243] [2023-02-14 11:57:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:57:17,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:57:17,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:57:17,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553620737] [2023-02-14 11:57:17,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:57:17,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:57:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:57:17,988 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) [2023-02-14 11:57:17,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 11:57:18,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:57:18,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:57:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-14 11:57:18,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:57:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 364 proven. 260 refuted. 0 times theorem prover too weak. 4236 trivial. 0 not checked. [2023-02-14 11:57:19,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:57:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 364 proven. 260 refuted. 0 times theorem prover too weak. 4236 trivial. 0 not checked. [2023-02-14 11:57:36,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:57:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680532243] [2023-02-14 11:57:36,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:57:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553620737] [2023-02-14 11:57:36,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553620737] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:57:36,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:57:36,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2023-02-14 11:57:36,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704234061] [2023-02-14 11:57:36,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:57:36,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 11:57:36,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:57:36,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 11:57:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 11:57:36,487 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 33 states, 27 states have (on average 2.074074074074074) internal successors, (56), 28 states have internal predecessors, (56), 24 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (96), 22 states have call predecessors, (96), 24 states have call successors, (96) [2023-02-14 11:57:39,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:57:43,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []