./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_unwindbound5.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 082e5acb2a505af9e43ec1a894890509a127a32d8ecd4c5193a456bddcb0f4a3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:43:43,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:43:43,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:43:43,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:43:43,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:43:43,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:43:44,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:43:44,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:43:44,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:43:44,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:43:44,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:43:44,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:43:44,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:43:44,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:43:44,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:43:44,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:43:44,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:43:44,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:43:44,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:43:44,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:43:44,019 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:43:44,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:43:44,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:43:44,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:43:44,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:43:44,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:43:44,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:43:44,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:43:44,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:43:44,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:43:44,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:43:44,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:43:44,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:43:44,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:43:44,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:43:44,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:43:44,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:43:44,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:43:44,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:43:44,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:43:44,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:43:44,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:43:44,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 03:43:44,078 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:43:44,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:43:44,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:43:44,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:43:44,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:43:44,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:43:44,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:43:44,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:43:44,081 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:43:44,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:43:44,082 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:43:44,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 03:43:44,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:43:44,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:43:44,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:43:44,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:43:44,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:43:44,084 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:43:44,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:43:44,084 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:43:44,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:43:44,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:43:44,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:43:44,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:43:44,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:43:44,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:43:44,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:43:44,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:43:44,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 03:43:44,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 03:43:44,086 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:43:44,087 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:43:44,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:43:44,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 082e5acb2a505af9e43ec1a894890509a127a32d8ecd4c5193a456bddcb0f4a3 [2022-07-21 03:43:44,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:43:44,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:43:44,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:43:44,398 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:43:44,398 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:43:44,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2022-07-21 03:43:44,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c972ebcb/c7ecd06b9d244606a3ac216481f19a7c/FLAG1a6364121 [2022-07-21 03:43:44,872 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:43:44,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2022-07-21 03:43:44,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c972ebcb/c7ecd06b9d244606a3ac216481f19a7c/FLAG1a6364121 [2022-07-21 03:43:44,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c972ebcb/c7ecd06b9d244606a3ac216481f19a7c [2022-07-21 03:43:44,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:43:44,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:43:44,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:43:44,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:43:44,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:43:44,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:43:44" (1/1) ... [2022-07-21 03:43:44,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdfb303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:44, skipping insertion in model container [2022-07-21 03:43:44,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:43:44" (1/1) ... [2022-07-21 03:43:44,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:43:44,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:43:45,039 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_unwindbound5.c[537,550] [2022-07-21 03:43:45,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:43:45,070 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 03:43:45,088 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_unwindbound5.c[537,550] [2022-07-21 03:43:45,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:43:45,109 INFO L208 MainTranslator]: Completed translation [2022-07-21 03:43:45,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45 WrapperNode [2022-07-21 03:43:45,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 03:43:45,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 03:43:45,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 03:43:45,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 03:43:45,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,161 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-21 03:43:45,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 03:43:45,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 03:43:45,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 03:43:45,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 03:43:45,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 03:43:45,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 03:43:45,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 03:43:45,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 03:43:45,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (1/1) ... [2022-07-21 03:43:45,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:43:45,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:43:45,224 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) [2022-07-21 03:43:45,239 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 [2022-07-21 03:43:45,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 03:43:45,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 03:43:45,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 03:43:45,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 03:43:45,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 03:43:45,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 03:43:45,331 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 03:43:45,332 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 03:43:45,497 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 03:43:45,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 03:43:45,516 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 03:43:45,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:43:45 BoogieIcfgContainer [2022-07-21 03:43:45,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 03:43:45,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 03:43:45,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 03:43:45,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 03:43:45,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:43:44" (1/3) ... [2022-07-21 03:43:45,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b26cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:43:45, skipping insertion in model container [2022-07-21 03:43:45,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:43:45" (2/3) ... [2022-07-21 03:43:45,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b26cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:43:45, skipping insertion in model container [2022-07-21 03:43:45,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:43:45" (3/3) ... [2022-07-21 03:43:45,538 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2022-07-21 03:43:45,550 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 03:43:45,559 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 03:43:45,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 03:43:45,649 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@68bdd985, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@802a58b [2022-07-21 03:43:45,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 03:43:45,656 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) [2022-07-21 03:43:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 03:43:45,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:45,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:43:45,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2022-07-21 03:43:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:45,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147039944] [2022-07-21 03:43:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:45,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 03:43:45,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147039944] [2022-07-21 03:43:45,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147039944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:43:45,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:43:45,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 03:43:45,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170001833] [2022-07-21 03:43:45,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:43:45,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 03:43:45,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 03:43:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:43:45,861 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) [2022-07-21 03:43:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:43:45,883 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2022-07-21 03:43:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 03:43:45,886 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 [2022-07-21 03:43:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:43:45,893 INFO L225 Difference]: With dead ends: 53 [2022-07-21 03:43:45,893 INFO L226 Difference]: Without dead ends: 24 [2022-07-21 03:43:45,896 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 [2022-07-21 03:43:45,899 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 [2022-07-21 03:43:45,900 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] [2022-07-21 03:43:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-21 03:43:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-21 03:43:45,925 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) [2022-07-21 03:43:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-07-21 03:43:45,927 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2022-07-21 03:43:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:43:45,928 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-07-21 03:43:45,928 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) [2022-07-21 03:43:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-07-21 03:43:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 03:43:45,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:45,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:43:45,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 03:43:45,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:45,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:45,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2022-07-21 03:43:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:45,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584120160] [2022-07-21 03:43:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 03:43:46,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:46,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584120160] [2022-07-21 03:43:46,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584120160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:43:46,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:43:46,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:43:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609346796] [2022-07-21 03:43:46,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:43:46,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:43:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:43:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:43:46,050 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) [2022-07-21 03:43:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:43:46,098 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-07-21 03:43:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:43:46,099 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 [2022-07-21 03:43:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:43:46,100 INFO L225 Difference]: With dead ends: 38 [2022-07-21 03:43:46,100 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 03:43:46,100 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 [2022-07-21 03:43:46,102 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 [2022-07-21 03:43:46,102 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] [2022-07-21 03:43:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 03:43:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-07-21 03:43:46,109 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) [2022-07-21 03:43:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-21 03:43:46,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-07-21 03:43:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:43:46,110 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-21 03:43:46,110 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) [2022-07-21 03:43:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-21 03:43:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 03:43:46,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:46,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:43:46,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 03:43:46,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2022-07-21 03:43:46,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:46,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266023601] [2022-07-21 03:43:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:46,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 03:43:46,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:46,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266023601] [2022-07-21 03:43:46,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266023601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:43:46,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:43:46,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 03:43:46,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114047859] [2022-07-21 03:43:46,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:43:46,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 03:43:46,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:46,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 03:43:46,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:43:46,148 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) [2022-07-21 03:43:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:43:46,168 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-07-21 03:43:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 03:43:46,169 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 [2022-07-21 03:43:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:43:46,170 INFO L225 Difference]: With dead ends: 44 [2022-07-21 03:43:46,170 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 03:43:46,170 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 [2022-07-21 03:43:46,171 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 [2022-07-21 03:43:46,172 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] [2022-07-21 03:43:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 03:43:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-21 03:43:46,177 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) [2022-07-21 03:43:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-21 03:43:46,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-07-21 03:43:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:43:46,179 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-21 03:43:46,179 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) [2022-07-21 03:43:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-21 03:43:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 03:43:46,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:46,180 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:43:46,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 03:43:46,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2022-07-21 03:43:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:46,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180491510] [2022-07-21 03:43:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:46,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:46,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 03:43:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 03:43:46,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:46,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180491510] [2022-07-21 03:43:46,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180491510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:43:46,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:43:46,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:43:46,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003586178] [2022-07-21 03:43:46,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:43:46,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:43:46,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:46,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:43:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:43:46,274 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) [2022-07-21 03:43:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:43:46,320 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-07-21 03:43:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:43:46,321 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 [2022-07-21 03:43:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:43:46,322 INFO L225 Difference]: With dead ends: 44 [2022-07-21 03:43:46,322 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 03:43:46,322 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 [2022-07-21 03:43:46,324 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 [2022-07-21 03:43:46,324 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] [2022-07-21 03:43:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 03:43:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2022-07-21 03:43:46,331 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) [2022-07-21 03:43:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-21 03:43:46,332 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2022-07-21 03:43:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:43:46,333 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-21 03:43:46,333 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) [2022-07-21 03:43:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-21 03:43:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 03:43:46,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:46,334 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:43:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 03:43:46,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2022-07-21 03:43:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:46,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403404859] [2022-07-21 03:43:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:46,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:43:46,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508710368] [2022-07-21 03:43:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:46,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:43:46,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:43:46,352 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) [2022-07-21 03:43:46,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 03:43:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:43:46,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:43:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:43:46,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:43:46,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:46,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403404859] [2022-07-21 03:43:46,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:43:46,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508710368] [2022-07-21 03:43:46,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508710368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:43:46,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:43:46,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:43:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992279628] [2022-07-21 03:43:46,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:43:46,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:43:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:43:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:43:46,540 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) [2022-07-21 03:43:48,618 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 [] [2022-07-21 03:43:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:43:48,786 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-07-21 03:43:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:43:48,786 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 [2022-07-21 03:43:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:43:48,789 INFO L225 Difference]: With dead ends: 51 [2022-07-21 03:43:48,789 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 03:43:48,790 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 [2022-07-21 03:43:48,791 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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 [2022-07-21 03:43:48,791 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] [2022-07-21 03:43:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 03:43:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-21 03:43:48,807 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) [2022-07-21 03:43:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2022-07-21 03:43:48,809 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 20 [2022-07-21 03:43:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:43:48,809 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2022-07-21 03:43:48,809 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) [2022-07-21 03:43:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2022-07-21 03:43:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 03:43:48,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:48,813 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] [2022-07-21 03:43:48,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 03:43:49,038 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 [2022-07-21 03:43:49,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:49,039 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2022-07-21 03:43:49,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:49,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452565283] [2022-07-21 03:43:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:49,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:49,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:43:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726133094] [2022-07-21 03:43:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:49,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:43:49,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:43:49,056 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) [2022-07-21 03:43:49,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 03:43:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:49,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:43:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:43:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 03:43:49,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:43:49,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452565283] [2022-07-21 03:43:49,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:43:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726133094] [2022-07-21 03:43:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726133094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:43:49,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:43:49,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 03:43:49,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917425097] [2022-07-21 03:43:49,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:43:49,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:43:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:43:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:43:49,219 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) [2022-07-21 03:43:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:43:49,264 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-07-21 03:43:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:43:49,264 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 [2022-07-21 03:43:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:43:49,266 INFO L225 Difference]: With dead ends: 68 [2022-07-21 03:43:49,266 INFO L226 Difference]: Without dead ends: 61 [2022-07-21 03:43:49,266 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 [2022-07-21 03:43:49,267 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 [2022-07-21 03:43:49,268 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] [2022-07-21 03:43:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-21 03:43:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-07-21 03:43:49,276 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) [2022-07-21 03:43:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-21 03:43:49,278 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 28 [2022-07-21 03:43:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:43:49,278 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-21 03:43:49,278 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) [2022-07-21 03:43:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-21 03:43:49,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 03:43:49,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:49,279 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] [2022-07-21 03:43:49,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 03:43:49,498 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 [2022-07-21 03:43:49,499 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2022-07-21 03:43:49,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:49,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528823162] [2022-07-21 03:43:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:49,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:49,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:43:49,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085299840] [2022-07-21 03:43:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:49,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:43:49,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:43:49,513 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) [2022-07-21 03:43:49,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 03:43:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:49,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 03:43:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:43:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 03:43:49,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:43:49,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:49,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528823162] [2022-07-21 03:43:49,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:43:49,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085299840] [2022-07-21 03:43:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085299840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:43:49,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:43:49,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 03:43:49,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026919221] [2022-07-21 03:43:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:43:49,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 03:43:49,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 03:43:49,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:43:49,743 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) [2022-07-21 03:43:51,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:43:53,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 03:43:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:43:53,474 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2022-07-21 03:43:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 03:43:53,476 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 [2022-07-21 03:43:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:43:53,480 INFO L225 Difference]: With dead ends: 74 [2022-07-21 03:43:53,480 INFO L226 Difference]: Without dead ends: 71 [2022-07-21 03:43:53,481 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 [2022-07-21 03:43:53,481 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-21 03:43:53,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 124 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-07-21 03:43:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-21 03:43:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-07-21 03:43:53,491 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) [2022-07-21 03:43:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-07-21 03:43:53,493 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2022-07-21 03:43:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:43:53,493 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-07-21 03:43:53,493 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) [2022-07-21 03:43:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-07-21 03:43:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 03:43:53,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:53,495 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] [2022-07-21 03:43:53,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 03:43:53,707 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 [2022-07-21 03:43:53,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:53,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2022-07-21 03:43:53,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:53,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098211430] [2022-07-21 03:43:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:53,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:53,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:43:53,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99694708] [2022-07-21 03:43:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:53,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:43:53,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:43:53,725 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) [2022-07-21 03:43:53,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 03:43:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:53,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:43:53,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:43:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 03:43:53,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:43:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 03:43:53,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:53,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098211430] [2022-07-21 03:43:53,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:43:53,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99694708] [2022-07-21 03:43:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99694708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:43:53,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:43:53,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-21 03:43:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683987259] [2022-07-21 03:43:53,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:43:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 03:43:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 03:43:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:43:53,920 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) [2022-07-21 03:43:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:43:54,079 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2022-07-21 03:43:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 03:43:54,080 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 [2022-07-21 03:43:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:43:54,082 INFO L225 Difference]: With dead ends: 152 [2022-07-21 03:43:54,082 INFO L226 Difference]: Without dead ends: 138 [2022-07-21 03:43:54,083 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 [2022-07-21 03:43:54,084 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 [2022-07-21 03:43:54,084 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] [2022-07-21 03:43:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-21 03:43:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2022-07-21 03:43:54,109 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) [2022-07-21 03:43:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-07-21 03:43:54,116 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 30 [2022-07-21 03:43:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:43:54,118 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-07-21 03:43:54,118 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) [2022-07-21 03:43:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-07-21 03:43:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 03:43:54,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:43:54,120 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:43:54,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 03:43:54,343 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 [2022-07-21 03:43:54,343 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:43:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:43:54,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1884102282, now seen corresponding path program 1 times [2022-07-21 03:43:54,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:43:54,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554893299] [2022-07-21 03:43:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:54,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:43:54,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:43:54,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613024368] [2022-07-21 03:43:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:43:54,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:43:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:43:54,366 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) [2022-07-21 03:43:54,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 03:43:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:43:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 03:43:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:43:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 03:43:54,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:43:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 03:43:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:43:58,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554893299] [2022-07-21 03:43:58,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:43:58,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613024368] [2022-07-21 03:43:58,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613024368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:43:58,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:43:58,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-07-21 03:43:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74803163] [2022-07-21 03:43:58,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:43:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 03:43:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:43:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 03:43:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=162, Unknown=1, NotChecked=0, Total=210 [2022-07-21 03:43:58,198 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) [2022-07-21 03:44:01,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 03:44:04,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:44:07,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:44:09,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:44:11,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:44:14,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:44:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:44:15,274 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-07-21 03:44:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 03:44:15,275 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 [2022-07-21 03:44:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:44:15,276 INFO L225 Difference]: With dead ends: 166 [2022-07-21 03:44:15,276 INFO L226 Difference]: Without dead ends: 158 [2022-07-21 03:44:15,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=93, Invalid=326, Unknown=1, NotChecked=0, Total=420 [2022-07-21 03:44:15,278 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 76 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-07-21 03:44:15,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 160 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 299 Invalid, 6 Unknown, 0 Unchecked, 16.9s Time] [2022-07-21 03:44:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-21 03:44:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2022-07-21 03:44:15,295 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) [2022-07-21 03:44:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-07-21 03:44:15,298 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 38 [2022-07-21 03:44:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:44:15,299 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-07-21 03:44:15,300 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) [2022-07-21 03:44:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-07-21 03:44:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 03:44:15,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:44:15,306 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] [2022-07-21 03:44:15,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 03:44:15,513 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 [2022-07-21 03:44:15,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:44:15,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:44:15,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1109899640, now seen corresponding path program 1 times [2022-07-21 03:44:15,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:44:15,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871365813] [2022-07-21 03:44:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:44:15,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:44:15,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:44:15,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610226009] [2022-07-21 03:44:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:44:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:44:15,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:44:15,527 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) [2022-07-21 03:44:15,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 03:44:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:44:15,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:44:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:44:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 03:44:15,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:44:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 03:44:15,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:44:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871365813] [2022-07-21 03:44:15,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:44:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610226009] [2022-07-21 03:44:15,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610226009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:44:15,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:44:15,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-07-21 03:44:15,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504434800] [2022-07-21 03:44:15,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:44:15,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:44:15,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:44:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:44:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:44:15,768 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2022-07-21 03:44:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:44:16,644 INFO L93 Difference]: Finished difference Result 227 states and 277 transitions. [2022-07-21 03:44:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 03:44:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 [2022-07-21 03:44:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:44:16,647 INFO L225 Difference]: With dead ends: 227 [2022-07-21 03:44:16,647 INFO L226 Difference]: Without dead ends: 203 [2022-07-21 03:44:16,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-21 03:44:16,648 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 78 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 03:44:16,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 232 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 03:44:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-21 03:44:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2022-07-21 03:44:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 138 states have internal predecessors, (155), 44 states have call successors, (44), 23 states have call predecessors, (44), 23 states have return successors, (41), 36 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-21 03:44:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 240 transitions. [2022-07-21 03:44:16,668 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 240 transitions. Word has length 42 [2022-07-21 03:44:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:44:16,668 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 240 transitions. [2022-07-21 03:44:16,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2022-07-21 03:44:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 240 transitions. [2022-07-21 03:44:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 03:44:16,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:44:16,670 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] [2022-07-21 03:44:16,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 03:44:16,886 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 [2022-07-21 03:44:16,887 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:44:16,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:44:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1108171762, now seen corresponding path program 1 times [2022-07-21 03:44:16,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:44:16,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728564381] [2022-07-21 03:44:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:44:16,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:44:16,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:44:16,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771855483] [2022-07-21 03:44:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:44:16,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:44:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:44:16,911 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) [2022-07-21 03:44:16,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process