./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/hard-u_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 28cfabe4b70eff8f7baaccb87c67f08c79dbf056ceeb2a0d56109f4b60f10f62 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:41:15,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:41:15,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:41:16,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:41:16,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:41:16,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:41:16,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:41:16,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:41:16,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:41:16,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:41:16,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:41:16,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:41:16,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:41:16,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:41:16,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:41:16,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:41:16,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:41:16,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:41:16,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:41:16,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:41:16,051 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:41:16,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:41:16,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:41:16,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:41:16,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:41:16,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:41:16,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:41:16,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:41:16,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:41:16,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:41:16,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:41:16,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:41:16,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:41:16,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:41:16,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:41:16,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:41:16,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:41:16,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:41:16,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:41:16,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:41:16,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:41:16,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:41:16,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:41:16,105 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:41:16,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:41:16,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:41:16,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:41:16,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:41:16,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:41:16,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:41:16,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:41:16,108 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:41:16,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:41:16,109 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:41:16,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:41:16,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:41:16,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:41:16,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:41:16,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:41:16,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:41:16,110 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:41:16,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:41:16,111 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:41:16,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:41:16,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:41:16,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:41:16,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:41:16,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:41:16,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:41:16,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:41:16,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:41:16,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:41:16,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:41:16,113 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:41:16,113 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:41:16,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:41:16,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28cfabe4b70eff8f7baaccb87c67f08c79dbf056ceeb2a0d56109f4b60f10f62 [2022-07-13 16:41:16,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:41:16,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:41:16,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:41:16,338 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:41:16,338 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:41:16,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2022-07-13 16:41:16,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20bc409b6/8f7bb6be5cb441b38fa05b6c207f6396/FLAGd882a9bed [2022-07-13 16:41:16,769 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:41:16,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2022-07-13 16:41:16,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20bc409b6/8f7bb6be5cb441b38fa05b6c207f6396/FLAGd882a9bed [2022-07-13 16:41:16,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20bc409b6/8f7bb6be5cb441b38fa05b6c207f6396 [2022-07-13 16:41:16,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:41:16,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:41:16,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:41:16,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:41:16,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:41:16,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:41:16" (1/1) ... [2022-07-13 16:41:16,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467442e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:16, skipping insertion in model container [2022-07-13 16:41:16,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:41:16" (1/1) ... [2022-07-13 16:41:16,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:41:16,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:41:16,949 WARN L230 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/hard-u_unwindbound20.c[537,550] [2022-07-13 16:41:16,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:41:16,985 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:41:17,001 WARN L230 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/hard-u_unwindbound20.c[537,550] [2022-07-13 16:41:17,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:41:17,032 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:41:17,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17 WrapperNode [2022-07-13 16:41:17,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:41:17,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:41:17,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:41:17,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:41:17,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,060 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-13 16:41:17,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:41:17,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:41:17,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:41:17,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:41:17,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:41:17,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:41:17,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:41:17,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:41:17,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (1/1) ... [2022-07-13 16:41:17,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:41:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:41:17,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 16:41:17,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 16:41:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:41:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:41:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:41:17,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:41:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:41:17,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:41:17,218 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:41:17,219 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:41:17,317 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:41:17,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:41:17,323 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 16:41:17,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:41:17 BoogieIcfgContainer [2022-07-13 16:41:17,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:41:17,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:41:17,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:41:17,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:41:17,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:41:16" (1/3) ... [2022-07-13 16:41:17,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5717745d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:41:17, skipping insertion in model container [2022-07-13 16:41:17,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:41:17" (2/3) ... [2022-07-13 16:41:17,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5717745d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:41:17, skipping insertion in model container [2022-07-13 16:41:17,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:41:17" (3/3) ... [2022-07-13 16:41:17,332 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.c [2022-07-13 16:41:17,344 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:41:17,344 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:41:17,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:41:17,406 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@398ae5a9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6006cfba [2022-07-13 16:41:17,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:41:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 16:41:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 16:41:17,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:17,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:17,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2022-07-13 16:41:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398613864] [2022-07-13 16:41:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:41:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398613864] [2022-07-13 16:41:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398613864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:41:17,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:41:17,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:41:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996769639] [2022-07-13 16:41:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:41:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:41:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:41:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:41:17,582 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:41:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:17,599 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2022-07-13 16:41:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:41:17,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 16:41:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:17,609 INFO L225 Difference]: With dead ends: 53 [2022-07-13 16:41:17,609 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 16:41:17,612 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 [2022-07-13 16:41:17,614 INFO L413 NwaCegarLoop]: 38 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, 38 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 [2022-07-13 16:41:17,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:41:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 16:41:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-13 16:41:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:41:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-07-13 16:41:17,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2022-07-13 16:41:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:17,681 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-07-13 16:41:17,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:41:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-07-13 16:41:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 16:41:17,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:17,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:17,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:41:17,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2022-07-13 16:41:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:17,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907749365] [2022-07-13 16:41:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:17,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:41:17,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:17,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907749365] [2022-07-13 16:41:17,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907749365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:41:17,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:41:17,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:41:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948384464] [2022-07-13 16:41:17,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:41:17,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:41:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:41:17,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:41:17,820 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:41:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:17,893 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-07-13 16:41:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:41:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 16:41:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:17,896 INFO L225 Difference]: With dead ends: 38 [2022-07-13 16:41:17,896 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 16:41:17,898 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 [2022-07-13 16:41:17,900 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:17,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:41:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 16:41:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-07-13 16:41:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:41:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-13 16:41:17,913 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-07-13 16:41:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:17,913 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-13 16:41:17,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:41:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-13 16:41:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 16:41:17,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:17,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:17,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 16:41:17,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2022-07-13 16:41:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:17,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952096406] [2022-07-13 16:41:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:17,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:41:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:17,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952096406] [2022-07-13 16:41:17,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952096406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:41:17,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:41:17,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:41:17,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374273450] [2022-07-13 16:41:17,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:41:17,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:41:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:17,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:41:17,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:41:17,961 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-13 16:41:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:17,983 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-07-13 16:41:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:41:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2022-07-13 16:41:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:17,985 INFO L225 Difference]: With dead ends: 44 [2022-07-13 16:41:17,985 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 16:41:17,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:41:17,988 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:17,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:41:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 16:41:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-13 16:41:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:41:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-13 16:41:17,997 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-07-13 16:41:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:17,997 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-13 16:41:17,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-13 16:41:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-13 16:41:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 16:41:17,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:17,998 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 16:41:17,999 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2022-07-13 16:41:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:18,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118058080] [2022-07-13 16:41:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:18,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:18,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 16:41:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:41:18,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118058080] [2022-07-13 16:41:18,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118058080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:41:18,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:41:18,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:41:18,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434415565] [2022-07-13 16:41:18,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:41:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:41:18,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:41:18,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:41:18,114 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 16:41:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:18,174 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-07-13 16:41:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:41:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-13 16:41:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:18,176 INFO L225 Difference]: With dead ends: 44 [2022-07-13 16:41:18,176 INFO L226 Difference]: Without dead ends: 42 [2022-07-13 16:41:18,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:41:18,177 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:18,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:41:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-13 16:41:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2022-07-13 16:41:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:41:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-13 16:41:18,185 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2022-07-13 16:41:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:18,185 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-13 16:41:18,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 16:41:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-13 16:41:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 16:41:18,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:18,186 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:18,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 16:41:18,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2022-07-13 16:41:18,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431518162] [2022-07-13 16:41:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:18,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:41:18,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852463727] [2022-07-13 16:41:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:18,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:18,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:41:18,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:41:18,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:41:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:18,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:41:18,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:41:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:41:18,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:41:18,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:18,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431518162] [2022-07-13 16:41:18,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:41:18,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852463727] [2022-07-13 16:41:18,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852463727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:41:18,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:41:18,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:41:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696402944] [2022-07-13 16:41:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:41:18,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:41:18,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:41:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:41:18,326 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:41:20,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:41:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:20,542 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-07-13 16:41:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:41:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-07-13 16:41:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:20,545 INFO L225 Difference]: With dead ends: 51 [2022-07-13 16:41:20,545 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 16:41:20,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:41:20,546 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:20,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 109 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 16:41:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 16:41:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-13 16:41:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 16:41:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2022-07-13 16:41:20,561 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 20 [2022-07-13 16:41:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:20,562 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2022-07-13 16:41:20,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:41:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2022-07-13 16:41:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 16:41:20,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:20,564 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:20,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:41:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:20,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2022-07-13 16:41:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:20,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97903728] [2022-07-13 16:41:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:20,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:20,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:41:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783329928] [2022-07-13 16:41:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:20,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:20,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:41:20,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:41:20,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:41:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:41:20,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:41:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:41:20,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:41:20,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:20,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97903728] [2022-07-13 16:41:20,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:41:20,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783329928] [2022-07-13 16:41:20,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783329928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:41:20,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:41:20,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 16:41:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652843891] [2022-07-13 16:41:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:41:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:41:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:41:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:41:20,942 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:41:20,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:20,998 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-07-13 16:41:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:41:20,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-13 16:41:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:21,001 INFO L225 Difference]: With dead ends: 68 [2022-07-13 16:41:21,002 INFO L226 Difference]: Without dead ends: 61 [2022-07-13 16:41:21,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:41:21,006 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:21,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 99 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:41:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-13 16:41:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-07-13 16:41:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 16:41:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-13 16:41:21,028 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 28 [2022-07-13 16:41:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:21,028 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-13 16:41:21,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:41:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-13 16:41:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 16:41:21,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:21,030 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:21,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 16:41:21,243 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,SelfDestructingSolverStorable5 [2022-07-13 16:41:21,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:21,244 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2022-07-13 16:41:21,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:21,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713534375] [2022-07-13 16:41:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:21,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:41:21,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776071423] [2022-07-13 16:41:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:21,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:21,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:41:21,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:41:21,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 16:41:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:21,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 16:41:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:41:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:41:21,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:41:21,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:21,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713534375] [2022-07-13 16:41:21,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:41:21,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776071423] [2022-07-13 16:41:21,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776071423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:41:21,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:41:21,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 16:41:21,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098438015] [2022-07-13 16:41:21,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:41:21,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:41:21,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:21,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:41:21,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:41:21,446 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:41:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:21,631 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2022-07-13 16:41:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 16:41:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-13 16:41:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:21,633 INFO L225 Difference]: With dead ends: 74 [2022-07-13 16:41:21,633 INFO L226 Difference]: Without dead ends: 71 [2022-07-13 16:41:21,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:41:21,633 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:21,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 124 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:41:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-13 16:41:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-07-13 16:41:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 48 states have internal predecessors, (56), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 16:41:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-07-13 16:41:21,644 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2022-07-13 16:41:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:21,645 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-07-13 16:41:21,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:41:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-07-13 16:41:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 16:41:21,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:21,646 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:21,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:41:21,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:21,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2022-07-13 16:41:21,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:21,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127760145] [2022-07-13 16:41:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:21,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:21,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:41:21,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912889519] [2022-07-13 16:41:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:21,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:41:21,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:41:21,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 16:41:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:41:21,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:41:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:41:22,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:41:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:41:22,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127760145] [2022-07-13 16:41:22,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:41:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912889519] [2022-07-13 16:41:22,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912889519] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:41:22,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:41:22,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-13 16:41:22,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559194856] [2022-07-13 16:41:22,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:41:22,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 16:41:22,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 16:41:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:41:22,078 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 16:41:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:22,219 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2022-07-13 16:41:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:41:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2022-07-13 16:41:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:22,222 INFO L225 Difference]: With dead ends: 152 [2022-07-13 16:41:22,222 INFO L226 Difference]: Without dead ends: 138 [2022-07-13 16:41:22,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:41:22,224 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 55 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:22,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 194 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:41:22,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-13 16:41:22,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2022-07-13 16:41:22,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 85 states have (on average 1.223529411764706) internal successors, (104), 89 states have internal predecessors, (104), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-13 16:41:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-07-13 16:41:22,255 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 30 [2022-07-13 16:41:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:22,255 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-07-13 16:41:22,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 16:41:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-07-13 16:41:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 16:41:22,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:22,256 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:22,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 16:41:22,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:22,474 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1884102282, now seen corresponding path program 1 times [2022-07-13 16:41:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890581239] [2022-07-13 16:41:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:22,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:22,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:41:22,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293645651] [2022-07-13 16:41:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:22,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:22,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:41:22,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:41:22,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 16:41:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:22,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 16:41:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:41:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 16:41:22,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:41:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 16:41:25,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:25,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890581239] [2022-07-13 16:41:25,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:41:25,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293645651] [2022-07-13 16:41:25,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293645651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:41:25,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:41:25,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-07-13 16:41:25,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344780235] [2022-07-13 16:41:25,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:41:25,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 16:41:25,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:25,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 16:41:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=162, Unknown=1, NotChecked=0, Total=210 [2022-07-13 16:41:25,445 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-13 16:41:29,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:41:32,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:41:34,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:41:36,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:41:38,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:41:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:40,573 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-07-13 16:41:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:41:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 38 [2022-07-13 16:41:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:40,576 INFO L225 Difference]: With dead ends: 166 [2022-07-13 16:41:40,576 INFO L226 Difference]: Without dead ends: 158 [2022-07-13 16:41:40,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=93, Invalid=326, Unknown=1, NotChecked=0, Total=420 [2022-07-13 16:41:40,577 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 78 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:40,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 160 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 299 Invalid, 4 Unknown, 0 Unchecked, 14.8s Time] [2022-07-13 16:41:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-13 16:41:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2022-07-13 16:41:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 101 states have internal predecessors, (116), 32 states have call successors, (32), 18 states have call predecessors, (32), 18 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-13 16:41:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-07-13 16:41:40,595 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 38 [2022-07-13 16:41:40,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:40,595 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-07-13 16:41:40,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-13 16:41:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-07-13 16:41:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 16:41:40,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:40,597 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:40,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 16:41:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:40,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:40,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1109899640, now seen corresponding path program 1 times [2022-07-13 16:41:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348370270] [2022-07-13 16:41:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:40,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:41:40,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846133852] [2022-07-13 16:41:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:40,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:40,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:41:40,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:41:40,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 16:41:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:41:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:41:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:41:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 16:41:40,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:41:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 16:41:41,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:41:41,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348370270] [2022-07-13 16:41:41,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:41:41,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846133852] [2022-07-13 16:41:41,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846133852] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:41:41,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:41:41,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-13 16:41:41,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708628513] [2022-07-13 16:41:41,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:41:41,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:41:41,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:41:41,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:41:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:41:41,059 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 16:41:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:41:42,126 INFO L93 Difference]: Finished difference Result 274 states and 339 transitions. [2022-07-13 16:41:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 16:41:42,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 42 [2022-07-13 16:41:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:41:42,128 INFO L225 Difference]: With dead ends: 274 [2022-07-13 16:41:42,128 INFO L226 Difference]: Without dead ends: 250 [2022-07-13 16:41:42,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:41:42,130 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 129 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:41:42,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 261 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 16:41:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-13 16:41:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2022-07-13 16:41:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 158 states have (on average 1.2025316455696202) internal successors, (190), 169 states have internal predecessors, (190), 56 states have call successors, (56), 28 states have call predecessors, (56), 28 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-13 16:41:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 298 transitions. [2022-07-13 16:41:42,154 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 298 transitions. Word has length 42 [2022-07-13 16:41:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:41:42,154 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 298 transitions. [2022-07-13 16:41:42,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 16:41:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 298 transitions. [2022-07-13 16:41:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 16:41:42,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:41:42,156 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:41:42,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 16:41:42,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:42,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:41:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:41:42,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1108171762, now seen corresponding path program 1 times [2022-07-13 16:41:42,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:41:42,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860340840] [2022-07-13 16:41:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:42,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:41:42,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:41:42,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519526896] [2022-07-13 16:41:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:41:42,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:41:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:41:42,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:41:42,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process