./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/uthash-2.0.2/uthash_BER_test4-3.i -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 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 04:21:23,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 04:21:23,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 04:21:23,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 04:21:23,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 04:21:23,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 04:21:23,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 04:21:23,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 04:21:23,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 04:21:23,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 04:21:23,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 04:21:23,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 04:21:23,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 04:21:23,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 04:21:23,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 04:21:23,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 04:21:23,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 04:21:23,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 04:21:23,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 04:21:23,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 04:21:23,303 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 04:21:23,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 04:21:23,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 04:21:23,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 04:21:23,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 04:21:23,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 04:21:23,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 04:21:23,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 04:21:23,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 04:21:23,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 04:21:23,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 04:21:23,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 04:21:23,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 04:21:23,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 04:21:23,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 04:21:23,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 04:21:23,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 04:21:23,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 04:21:23,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 04:21:23,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 04:21:23,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 04:21:23,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 04:21:23,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 04:21:23,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 04:21:23,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 04:21:23,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 04:21:23,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 04:21:23,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 04:21:23,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 04:21:23,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 04:21:23,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 04:21:23,362 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 04:21:23,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 04:21:23,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 04:21:23,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 04:21:23,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 04:21:23,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 04:21:23,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 04:21:23,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 04:21:23,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 04:21:23,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 04:21:23,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 04:21:23,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 04:21:23,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 04:21:23,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 04:21:23,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 04:21:23,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 04:21:23,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 04:21:23,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 04:21:23,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 04:21:23,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 04:21:23,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 04:21:23,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 04:21:23,368 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 04:21:23,368 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 04:21:23,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 04:21:23,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 [2022-07-20 04:21:23,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 04:21:23,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 04:21:23,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 04:21:23,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 04:21:23,580 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 04:21:23,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2022-07-20 04:21:23,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797a446a1/a0e1c14253104aad9b3c9bcea254e058/FLAG63481e844 [2022-07-20 04:21:24,100 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 04:21:24,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2022-07-20 04:21:24,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797a446a1/a0e1c14253104aad9b3c9bcea254e058/FLAG63481e844 [2022-07-20 04:21:24,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797a446a1/a0e1c14253104aad9b3c9bcea254e058 [2022-07-20 04:21:24,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 04:21:24,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 04:21:24,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 04:21:24,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 04:21:24,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 04:21:24,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3424ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24, skipping insertion in model container [2022-07-20 04:21:24,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 04:21:24,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 04:21:24,510 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/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2022-07-20 04:21:24,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 04:21:24,648 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 04:21:24,680 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/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2022-07-20 04:21:24,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 04:21:24,770 INFO L208 MainTranslator]: Completed translation [2022-07-20 04:21:24,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24 WrapperNode [2022-07-20 04:21:24,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 04:21:24,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 04:21:24,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 04:21:24,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 04:21:24,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,892 INFO L137 Inliner]: procedures = 177, calls = 448, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1445 [2022-07-20 04:21:24,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 04:21:24,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 04:21:24,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 04:21:24,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 04:21:24,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:24,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:25,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 04:21:25,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 04:21:25,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 04:21:25,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 04:21:25,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (1/1) ... [2022-07-20 04:21:25,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 04:21:25,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:25,028 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) [2022-07-20 04:21:25,040 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 [2022-07-20 04:21:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 04:21:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 04:21:25,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 04:21:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 04:21:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-20 04:21:25,057 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-20 04:21:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 04:21:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 04:21:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 04:21:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 04:21:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 04:21:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 04:21:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 04:21:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 04:21:25,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 04:21:25,344 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 04:21:25,345 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 04:21:27,195 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 04:21:27,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 04:21:27,201 INFO L299 CfgBuilder]: Removed 77 assume(true) statements. [2022-07-20 04:21:27,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:21:27 BoogieIcfgContainer [2022-07-20 04:21:27,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 04:21:27,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 04:21:27,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 04:21:27,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 04:21:27,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:21:24" (1/3) ... [2022-07-20 04:21:27,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40cc0504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:21:27, skipping insertion in model container [2022-07-20 04:21:27,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:21:24" (2/3) ... [2022-07-20 04:21:27,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40cc0504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:21:27, skipping insertion in model container [2022-07-20 04:21:27,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:21:27" (3/3) ... [2022-07-20 04:21:27,209 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-3.i [2022-07-20 04:21:27,218 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 04:21:27,219 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 04:21:27,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 04:21:27,283 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@426b9b1f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3ada2ea1 [2022-07-20 04:21:27,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 04:21:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 04:21:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 04:21:27,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:27,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:27,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1523630084, now seen corresponding path program 1 times [2022-07-20 04:21:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022737171] [2022-07-20 04:21:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:21:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:21:27,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:27,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022737171] [2022-07-20 04:21:27,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022737171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:21:27,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:21:27,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:21:27,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835791165] [2022-07-20 04:21:27,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:21:27,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:21:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:21:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:21:27,488 INFO L87 Difference]: Start difference. First operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:21:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:27,591 INFO L93 Difference]: Finished difference Result 690 states and 1177 transitions. [2022-07-20 04:21:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:21:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 04:21:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:27,603 INFO L225 Difference]: With dead ends: 690 [2022-07-20 04:21:27,603 INFO L226 Difference]: Without dead ends: 377 [2022-07-20 04:21:27,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:21:27,612 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 211 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:27,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 739 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:21:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-20 04:21:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 208. [2022-07-20 04:21:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 199 states have internal predecessors, (250), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 04:21:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-07-20 04:21:27,651 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 10 [2022-07-20 04:21:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:27,651 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-07-20 04:21:27,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:21:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-07-20 04:21:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 04:21:27,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:27,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:27,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 04:21:27,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1954115269, now seen corresponding path program 1 times [2022-07-20 04:21:27,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:27,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903946546] [2022-07-20 04:21:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:27,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:27,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:27,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008986237] [2022-07-20 04:21:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:27,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:27,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:27,851 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) [2022-07-20 04:21:27,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 04:21:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:21:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:21:28,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:21:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:21:28,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:21:28,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:28,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903946546] [2022-07-20 04:21:28,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:21:28,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008986237] [2022-07-20 04:21:28,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008986237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:21:28,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:21:28,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:21:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376727883] [2022-07-20 04:21:28,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:21:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:21:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:21:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:21:28,700 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-07-20 04:21:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:28,795 INFO L93 Difference]: Finished difference Result 434 states and 592 transitions. [2022-07-20 04:21:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:21:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 108 [2022-07-20 04:21:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:28,798 INFO L225 Difference]: With dead ends: 434 [2022-07-20 04:21:28,810 INFO L226 Difference]: Without dead ends: 229 [2022-07-20 04:21:28,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:21:28,812 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 9 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:28,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 507 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:21:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-20 04:21:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-07-20 04:21:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 209 states have (on average 1.291866028708134) internal successors, (270), 219 states have internal predecessors, (270), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 04:21:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 302 transitions. [2022-07-20 04:21:28,841 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 302 transitions. Word has length 108 [2022-07-20 04:21:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:28,842 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 302 transitions. [2022-07-20 04:21:28,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-07-20 04:21:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 302 transitions. [2022-07-20 04:21:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 04:21:28,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:28,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:28,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 04:21:29,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:29,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash -721877113, now seen corresponding path program 1 times [2022-07-20 04:21:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:29,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990572685] [2022-07-20 04:21:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:29,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:29,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:29,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870359058] [2022-07-20 04:21:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:29,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:29,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:29,193 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) [2022-07-20 04:21:29,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 04:21:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:21:30,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:21:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:21:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:21:30,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:21:30,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990572685] [2022-07-20 04:21:30,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:21:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870359058] [2022-07-20 04:21:30,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870359058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:21:30,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:21:30,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:21:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593086400] [2022-07-20 04:21:30,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:21:30,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:21:30,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:21:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:21:30,174 INFO L87 Difference]: Start difference. First operand 228 states and 302 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-07-20 04:21:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:30,235 INFO L93 Difference]: Finished difference Result 474 states and 632 transitions. [2022-07-20 04:21:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:21:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 108 [2022-07-20 04:21:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:30,238 INFO L225 Difference]: With dead ends: 474 [2022-07-20 04:21:30,238 INFO L226 Difference]: Without dead ends: 249 [2022-07-20 04:21:30,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:21:30,240 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 8 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:30,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 509 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:21:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-20 04:21:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2022-07-20 04:21:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 229 states have (on average 1.2663755458515285) internal successors, (290), 239 states have internal predecessors, (290), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 04:21:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 322 transitions. [2022-07-20 04:21:30,265 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 322 transitions. Word has length 108 [2022-07-20 04:21:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:30,265 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 322 transitions. [2022-07-20 04:21:30,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-07-20 04:21:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 322 transitions. [2022-07-20 04:21:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 04:21:30,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:30,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:30,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 04:21:30,479 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,SelfDestructingSolverStorable2 [2022-07-20 04:21:30,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -649490555, now seen corresponding path program 1 times [2022-07-20 04:21:30,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:30,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683881320] [2022-07-20 04:21:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:30,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:30,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691481183] [2022-07-20 04:21:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:30,610 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) [2022-07-20 04:21:30,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 04:21:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:21:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:21:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:21:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:21:31,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:21:31,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:31,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683881320] [2022-07-20 04:21:31,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:21:31,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691481183] [2022-07-20 04:21:31,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691481183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:21:31,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:21:31,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 04:21:31,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659246305] [2022-07-20 04:21:31,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:21:31,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 04:21:31,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:31,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 04:21:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 04:21:31,679 INFO L87 Difference]: Start difference. First operand 248 states and 322 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2022-07-20 04:21:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:31,729 INFO L93 Difference]: Finished difference Result 485 states and 633 transitions. [2022-07-20 04:21:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 04:21:31,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 108 [2022-07-20 04:21:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:31,731 INFO L225 Difference]: With dead ends: 485 [2022-07-20 04:21:31,731 INFO L226 Difference]: Without dead ends: 240 [2022-07-20 04:21:31,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:21:31,733 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 228 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:31,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 540 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:21:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-20 04:21:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2022-07-20 04:21:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 215 states have (on average 1.2511627906976743) internal successors, (269), 225 states have internal predecessors, (269), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 04:21:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 301 transitions. [2022-07-20 04:21:31,742 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 301 transitions. Word has length 108 [2022-07-20 04:21:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:31,742 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 301 transitions. [2022-07-20 04:21:31,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2022-07-20 04:21:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 301 transitions. [2022-07-20 04:21:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 04:21:31,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:31,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:31,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 04:21:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:31,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2041338185, now seen corresponding path program 1 times [2022-07-20 04:21:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532807589] [2022-07-20 04:21:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:31,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:32,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:32,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510846680] [2022-07-20 04:21:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:32,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:32,066 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) [2022-07-20 04:21:32,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 04:21:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:21:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 04:21:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:21:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:21:33,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:21:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:33,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532807589] [2022-07-20 04:21:33,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:21:33,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510846680] [2022-07-20 04:21:33,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510846680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:21:33,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:21:33,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 04:21:33,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074929509] [2022-07-20 04:21:33,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:21:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 04:21:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 04:21:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:21:33,209 INFO L87 Difference]: Start difference. First operand 234 states and 301 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2022-07-20 04:21:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:33,297 INFO L93 Difference]: Finished difference Result 546 states and 700 transitions. [2022-07-20 04:21:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 04:21:33,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 108 [2022-07-20 04:21:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:33,299 INFO L225 Difference]: With dead ends: 546 [2022-07-20 04:21:33,299 INFO L226 Difference]: Without dead ends: 315 [2022-07-20 04:21:33,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:21:33,300 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 210 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:33,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1075 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 04:21:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-20 04:21:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 220. [2022-07-20 04:21:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 201 states have (on average 1.2338308457711442) internal successors, (248), 211 states have internal predecessors, (248), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 04:21:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 280 transitions. [2022-07-20 04:21:33,308 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 280 transitions. Word has length 108 [2022-07-20 04:21:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:33,309 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 280 transitions. [2022-07-20 04:21:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2022-07-20 04:21:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 280 transitions. [2022-07-20 04:21:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 04:21:33,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:33,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:33,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 04:21:33,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:33,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash 459394627, now seen corresponding path program 1 times [2022-07-20 04:21:33,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:33,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630146979] [2022-07-20 04:21:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:33,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:33,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134730222] [2022-07-20 04:21:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:33,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:33,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:33,688 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) [2022-07-20 04:21:33,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 04:21:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:21:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:21:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:21:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:21:35,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 04:21:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:21:35,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630146979] [2022-07-20 04:21:35,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:21:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134730222] [2022-07-20 04:21:35,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134730222] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 04:21:35,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 04:21:35,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-20 04:21:35,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601754769] [2022-07-20 04:21:35,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 04:21:35,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 04:21:35,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 04:21:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-20 04:21:35,201 INFO L87 Difference]: Start difference. First operand 220 states and 280 transitions. Second operand has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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) [2022-07-20 04:21:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:35,278 INFO L93 Difference]: Finished difference Result 797 states and 999 transitions. [2022-07-20 04:21:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 04:21:35,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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 108 [2022-07-20 04:21:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:35,281 INFO L225 Difference]: With dead ends: 797 [2022-07-20 04:21:35,282 INFO L226 Difference]: Without dead ends: 766 [2022-07-20 04:21:35,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-20 04:21:35,283 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 923 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:35,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 04:21:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-07-20 04:21:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2022-07-20 04:21:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 729 states have (on average 1.2043895747599451) internal successors, (878), 739 states have internal predecessors, (878), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-20 04:21:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 946 transitions. [2022-07-20 04:21:35,313 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 946 transitions. Word has length 108 [2022-07-20 04:21:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:35,314 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 946 transitions. [2022-07-20 04:21:35,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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) [2022-07-20 04:21:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 946 transitions. [2022-07-20 04:21:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-07-20 04:21:35,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:35,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:35,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 04:21:35,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:35,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:35,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2041905512, now seen corresponding path program 2 times [2022-07-20 04:21:35,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:35,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012370641] [2022-07-20 04:21:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:35,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:36,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:36,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210242097] [2022-07-20 04:21:36,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 04:21:36,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:36,037 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) [2022-07-20 04:21:36,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 04:21:37,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 04:21:37,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 04:21:37,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 04:21:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:21:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-07-20 04:21:38,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:21:38,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012370641] [2022-07-20 04:21:38,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:21:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210242097] [2022-07-20 04:21:38,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210242097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:21:38,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:21:38,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 04:21:38,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330699107] [2022-07-20 04:21:38,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:21:38,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 04:21:38,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:38,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 04:21:38,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 04:21:38,759 INFO L87 Difference]: Start difference. First operand 766 states and 946 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2022-07-20 04:21:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:39,082 INFO L93 Difference]: Finished difference Result 1385 states and 1717 transitions. [2022-07-20 04:21:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:21:39,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 402 [2022-07-20 04:21:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:39,085 INFO L225 Difference]: With dead ends: 1385 [2022-07-20 04:21:39,085 INFO L226 Difference]: Without dead ends: 764 [2022-07-20 04:21:39,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 04:21:39,086 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 65 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:39,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 728 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 04:21:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-07-20 04:21:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 764. [2022-07-20 04:21:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 727 states have (on average 1.203576341127923) internal successors, (875), 737 states have internal predecessors, (875), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-20 04:21:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 943 transitions. [2022-07-20 04:21:39,102 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 943 transitions. Word has length 402 [2022-07-20 04:21:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:39,102 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 943 transitions. [2022-07-20 04:21:39,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2022-07-20 04:21:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 943 transitions. [2022-07-20 04:21:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-07-20 04:21:39,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:39,107 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:39,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 04:21:39,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:39,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash -280738903, now seen corresponding path program 1 times [2022-07-20 04:21:39,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:39,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013788106] [2022-07-20 04:21:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:39,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:39,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:39,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811512123] [2022-07-20 04:21:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:39,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:39,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:39,755 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) [2022-07-20 04:21:39,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 04:21:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:21:43,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 10791 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 04:21:43,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:21:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 586 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 04:21:43,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 04:21:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 586 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 04:21:44,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:44,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013788106] [2022-07-20 04:21:44,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:21:44,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811512123] [2022-07-20 04:21:44,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811512123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 04:21:44,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 04:21:44,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-20 04:21:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816053370] [2022-07-20 04:21:44,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 04:21:44,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 04:21:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:44,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 04:21:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-20 04:21:44,179 INFO L87 Difference]: Start difference. First operand 764 states and 943 transitions. Second operand has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 04:21:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:44,431 INFO L93 Difference]: Finished difference Result 1887 states and 2331 transitions. [2022-07-20 04:21:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 04:21:44,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 417 [2022-07-20 04:21:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:44,439 INFO L225 Difference]: With dead ends: 1887 [2022-07-20 04:21:44,439 INFO L226 Difference]: Without dead ends: 1856 [2022-07-20 04:21:44,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-20 04:21:44,441 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 2746 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:44,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2802 Valid, 2543 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 04:21:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2022-07-20 04:21:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1856. [2022-07-20 04:21:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1783 states have (on average 1.1974200785193494) internal successors, (2135), 1793 states have internal predecessors, (2135), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-20 04:21:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2275 transitions. [2022-07-20 04:21:44,484 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2275 transitions. Word has length 417 [2022-07-20 04:21:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:44,485 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2275 transitions. [2022-07-20 04:21:44,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 04:21:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2275 transitions. [2022-07-20 04:21:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2022-07-20 04:21:44,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:44,508 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:44,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 04:21:44,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:44,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash 112034707, now seen corresponding path program 2 times [2022-07-20 04:21:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:44,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174291485] [2022-07-20 04:21:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:44,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:45,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:45,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253582895] [2022-07-20 04:21:45,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 04:21:45,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:45,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:21:45,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 04:21:53,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 04:21:53,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 04:21:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 28173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 04:21:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:21:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4406 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 4081 trivial. 0 not checked. [2022-07-20 04:21:54,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:21:54,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:21:54,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174291485] [2022-07-20 04:21:54,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:21:54,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253582895] [2022-07-20 04:21:54,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253582895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:21:54,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:21:54,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:21:54,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020555521] [2022-07-20 04:21:54,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:21:54,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:21:54,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:21:54,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:21:54,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:21:54,252 INFO L87 Difference]: Start difference. First operand 1856 states and 2275 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:21:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:21:54,296 INFO L93 Difference]: Finished difference Result 3654 states and 4484 transitions. [2022-07-20 04:21:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:21:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 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 1005 [2022-07-20 04:21:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:21:54,304 INFO L225 Difference]: With dead ends: 3654 [2022-07-20 04:21:54,305 INFO L226 Difference]: Without dead ends: 1854 [2022-07-20 04:21:54,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 1003 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:21:54,308 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 15 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:21:54,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 517 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:21:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2022-07-20 04:21:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1854. [2022-07-20 04:21:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1781 states have (on average 1.197080291970803) internal successors, (2132), 1791 states have internal predecessors, (2132), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-20 04:21:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2272 transitions. [2022-07-20 04:21:54,345 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2272 transitions. Word has length 1005 [2022-07-20 04:21:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:21:54,346 INFO L495 AbstractCegarLoop]: Abstraction has 1854 states and 2272 transitions. [2022-07-20 04:21:54,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:21:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2272 transitions. [2022-07-20 04:21:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2022-07-20 04:21:54,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:21:54,356 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:21:54,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 04:21:54,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 04:21:54,560 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:21:54,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:21:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash 582051154, now seen corresponding path program 1 times [2022-07-20 04:21:54,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:21:54,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458210194] [2022-07-20 04:21:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:54,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:21:55,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:21:55,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077405561] [2022-07-20 04:21:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:21:55,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:21:55,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:21:55,617 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:21:55,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process