./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c36dfa3b 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_OAT_test7-2.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 0dff9798a0295b679f16f480562390718a9087ab219890b5f7fb9fb3739a540b --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-04 16:01:44,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-04 16:01:44,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-04 16:01:44,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-04 16:01:44,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-04 16:01:44,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-04 16:01:44,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-04 16:01:44,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-04 16:01:44,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-04 16:01:44,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-04 16:01:44,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-04 16:01:44,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-04 16:01:44,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-04 16:01:44,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-04 16:01:44,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-04 16:01:44,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-04 16:01:44,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-04 16:01:44,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-04 16:01:44,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-04 16:01:44,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-04 16:01:44,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-04 16:01:44,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-04 16:01:44,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-04 16:01:44,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-04 16:01:44,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-04 16:01:44,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-04 16:01:44,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-04 16:01:44,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-04 16:01:44,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-04 16:01:44,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-04 16:01:44,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-04 16:01:44,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-04 16:01:44,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-04 16:01:44,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-04 16:01:44,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-04 16:01:44,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-04 16:01:44,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-04 16:01:44,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-04 16:01:44,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-04 16:01:44,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-04 16:01:44,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-04 16:01:44,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-04 16:01:44,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-04 16:01:44,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-04 16:01:44,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-04 16:01:44,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-04 16:01:44,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-04 16:01:44,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-04 16:01:44,549 INFO L138 SettingsManager]: * Use SBE=true [2021-11-04 16:01:44,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-04 16:01:44,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-04 16:01:44,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-04 16:01:44,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-04 16:01:44,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-04 16:01:44,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-04 16:01:44,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-04 16:01:44,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-04 16:01:44,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-04 16:01:44,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-04 16:01:44,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-04 16:01:44,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-04 16:01:44,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-04 16:01:44,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-04 16:01:44,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-04 16:01:44,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 16:01:44,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-04 16:01:44,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-04 16:01:44,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-04 16:01:44,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-04 16:01:44,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-04 16:01:44,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-04 16:01:44,553 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-04 16:01:44,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-04 16:01:44,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-04 16:01:44,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dff9798a0295b679f16f480562390718a9087ab219890b5f7fb9fb3739a540b [2021-11-04 16:01:44,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-04 16:01:44,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-04 16:01:44,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-04 16:01:44,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-04 16:01:44,837 INFO L275 PluginConnector]: CDTParser initialized [2021-11-04 16:01:44,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i [2021-11-04 16:01:44,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917735dd3/6d3ea802f15245f8a7310acd3f2298d7/FLAG1de8d5a3a [2021-11-04 16:01:45,445 INFO L306 CDTParser]: Found 1 translation units. [2021-11-04 16:01:45,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i [2021-11-04 16:01:45,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917735dd3/6d3ea802f15245f8a7310acd3f2298d7/FLAG1de8d5a3a [2021-11-04 16:01:45,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917735dd3/6d3ea802f15245f8a7310acd3f2298d7 [2021-11-04 16:01:45,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-04 16:01:45,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-04 16:01:45,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-04 16:01:45,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-04 16:01:45,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-04 16:01:45,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 04:01:45" (1/1) ... [2021-11-04 16:01:45,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d518587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:45, skipping insertion in model container [2021-11-04 16:01:45,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 04:01:45" (1/1) ... [2021-11-04 16:01:45,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-04 16:01:45,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-04 16:01:46,219 WARN L228 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_OAT_test7-2.i[33021,33034] [2021-11-04 16:01:46,316 WARN L228 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_OAT_test7-2.i[44124,44137] [2021-11-04 16:01:46,316 WARN L228 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_OAT_test7-2.i[44245,44258] [2021-11-04 16:01:46,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 16:01:46,335 INFO L203 MainTranslator]: Completed pre-run [2021-11-04 16:01:46,359 WARN L228 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_OAT_test7-2.i[33021,33034] [2021-11-04 16:01:46,406 WARN L228 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_OAT_test7-2.i[44124,44137] [2021-11-04 16:01:46,407 WARN L228 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_OAT_test7-2.i[44245,44258] [2021-11-04 16:01:46,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 16:01:46,440 INFO L208 MainTranslator]: Completed translation [2021-11-04 16:01:46,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46 WrapperNode [2021-11-04 16:01:46,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-04 16:01:46,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-04 16:01:46,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-04 16:01:46,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-04 16:01:46,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-04 16:01:46,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-04 16:01:46,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-04 16:01:46,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-04 16:01:46,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-04 16:01:46,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-04 16:01:46,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-04 16:01:46,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-04 16:01:46,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (1/1) ... [2021-11-04 16:01:46,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 16:01:46,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:46,680 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) [2021-11-04 16:01:46,714 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 [2021-11-04 16:01:46,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-04 16:01:46,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-04 16:01:46,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-04 16:01:46,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-04 16:01:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-04 16:01:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-04 16:01:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-04 16:01:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-04 16:01:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-04 16:01:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-04 16:01:46,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-04 16:01:47,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-04 16:01:47,355 INFO L299 CfgBuilder]: Removed 82 assume(true) statements. [2021-11-04 16:01:47,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 04:01:47 BoogieIcfgContainer [2021-11-04 16:01:47,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-04 16:01:47,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-04 16:01:47,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-04 16:01:47,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-04 16:01:47,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 04:01:45" (1/3) ... [2021-11-04 16:01:47,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2491b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 04:01:47, skipping insertion in model container [2021-11-04 16:01:47,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:01:46" (2/3) ... [2021-11-04 16:01:47,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2491b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 04:01:47, skipping insertion in model container [2021-11-04 16:01:47,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 04:01:47" (3/3) ... [2021-11-04 16:01:47,367 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test7-2.i [2021-11-04 16:01:47,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-04 16:01:47,373 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-04 16:01:47,414 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-04 16:01:47,418 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-04 16:01:47,419 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-04 16:01:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-04 16:01:47,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:47,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:47,436 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-04 16:01:47,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:47,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339378016] [2021-11-04 16:01:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:47,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 16:01:47,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:47,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339378016] [2021-11-04 16:01:47,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339378016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:47,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:47,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-04 16:01:47,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217470974] [2021-11-04 16:01:47,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:47,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-04 16:01:47,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:47,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-04 16:01:47,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-04 16:01:47,585 INFO L87 Difference]: Start difference. First operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:48,008 INFO L93 Difference]: Finished difference Result 419 states and 707 transitions. [2021-11-04 16:01:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-04 16:01:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-04 16:01:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:48,019 INFO L225 Difference]: With dead ends: 419 [2021-11-04 16:01:48,020 INFO L226 Difference]: Without dead ends: 177 [2021-11-04 16:01:48,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-04 16:01:48,027 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 291.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 361.68ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:48,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 276 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 361.68ms Time] [2021-11-04 16:01:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-04 16:01:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-04 16:01:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 176 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-04 16:01:48,066 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-04 16:01:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:48,067 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-04 16:01:48,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-04 16:01:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-04 16:01:48,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:48,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:48,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-04 16:01:48,068 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-04 16:01:48,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:48,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693137547] [2021-11-04 16:01:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:48,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 16:01:48,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:48,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693137547] [2021-11-04 16:01:48,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693137547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:48,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:48,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 16:01:48,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534613384] [2021-11-04 16:01:48,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:48,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 16:01:48,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 16:01:48,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 16:01:48,114 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:48,927 INFO L93 Difference]: Finished difference Result 382 states and 501 transitions. [2021-11-04 16:01:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 16:01:48,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-04 16:01:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:48,929 INFO L225 Difference]: With dead ends: 382 [2021-11-04 16:01:48,929 INFO L226 Difference]: Without dead ends: 295 [2021-11-04 16:01:48,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.64ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 16:01:48,930 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 146 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 662.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 778.15ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:48,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 0 Invalid, 722 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [3 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 778.15ms Time] [2021-11-04 16:01:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-04 16:01:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2021-11-04 16:01:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.3220338983050848) internal successors, (234), 178 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2021-11-04 16:01:48,959 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 10 [2021-11-04 16:01:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:48,959 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2021-11-04 16:01:48,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2021-11-04 16:01:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-04 16:01:48,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:48,961 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:48,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-04 16:01:48,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:48,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2095912151, now seen corresponding path program 1 times [2021-11-04 16:01:48,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:48,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779849042] [2021-11-04 16:01:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:48,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:48,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:48,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766708619] [2021-11-04 16:01:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:48,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:48,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:48,982 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) [2021-11-04 16:01:48,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-04 16:01:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:49,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 16:01:49,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 16:01:49,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 16:01:49,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:49,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779849042] [2021-11-04 16:01:49,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:49,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766708619] [2021-11-04 16:01:49,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766708619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:49,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:49,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 16:01:49,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384571935] [2021-11-04 16:01:49,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:49,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 16:01:49,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 16:01:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 16:01:49,248 INFO L87 Difference]: Start difference. First operand 179 states and 234 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:49,736 INFO L93 Difference]: Finished difference Result 375 states and 495 transitions. [2021-11-04 16:01:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 16:01:49,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-04 16:01:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:49,738 INFO L225 Difference]: With dead ends: 375 [2021-11-04 16:01:49,738 INFO L226 Difference]: Without dead ends: 200 [2021-11-04 16:01:49,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.46ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 16:01:49,740 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 413.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 476.59ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:49,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 481 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [28 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 476.59ms Time] [2021-11-04 16:01:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-04 16:01:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-04 16:01:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 197 states have (on average 1.2893401015228427) internal successors, (254), 198 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 254 transitions. [2021-11-04 16:01:49,746 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 254 transitions. Word has length 62 [2021-11-04 16:01:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:49,746 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 254 transitions. [2021-11-04 16:01:49,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 254 transitions. [2021-11-04 16:01:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-04 16:01:49,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:49,748 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:49,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-04 16:01:49,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:49,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1305568807, now seen corresponding path program 1 times [2021-11-04 16:01:49,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:49,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488648820] [2021-11-04 16:01:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:49,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:49,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:49,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116508564] [2021-11-04 16:01:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:49,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:49,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:50,012 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) [2021-11-04 16:01:50,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-04 16:01:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:50,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 16:01:50,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 16:01:50,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 16:01:50,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:50,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488648820] [2021-11-04 16:01:50,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:50,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116508564] [2021-11-04 16:01:50,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116508564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:50,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:50,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 16:01:50,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698337531] [2021-11-04 16:01:50,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:50,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 16:01:50,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 16:01:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 16:01:50,352 INFO L87 Difference]: Start difference. First operand 199 states and 254 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:50,735 INFO L93 Difference]: Finished difference Result 386 states and 496 transitions. [2021-11-04 16:01:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 16:01:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-04 16:01:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:50,736 INFO L225 Difference]: With dead ends: 386 [2021-11-04 16:01:50,736 INFO L226 Difference]: Without dead ends: 191 [2021-11-04 16:01:50,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.12ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 16:01:50,738 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 220 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 363.63ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:50,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 0 Invalid, 486 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [24 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 363.63ms Time] [2021-11-04 16:01:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-04 16:01:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2021-11-04 16:01:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.273224043715847) internal successors, (233), 184 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2021-11-04 16:01:50,747 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 62 [2021-11-04 16:01:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:50,748 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2021-11-04 16:01:50,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2021-11-04 16:01:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-04 16:01:50,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:50,751 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:50,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-04 16:01:50,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-04 16:01:50,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1777715509, now seen corresponding path program 1 times [2021-11-04 16:01:50,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:50,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328893517] [2021-11-04 16:01:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:50,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:51,006 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:51,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087341302] [2021-11-04 16:01:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:51,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:51,013 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) [2021-11-04 16:01:51,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-04 16:01:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:51,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-04 16:01:51,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 16:01:51,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 16:01:51,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:51,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328893517] [2021-11-04 16:01:51,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:51,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087341302] [2021-11-04 16:01:51,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087341302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:51,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:51,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 16:01:51,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203620349] [2021-11-04 16:01:51,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:51,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 16:01:51,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:51,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 16:01:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 16:01:51,341 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:51,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:51,871 INFO L93 Difference]: Finished difference Result 479 states and 602 transitions. [2021-11-04 16:01:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 16:01:51,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-04 16:01:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:51,873 INFO L225 Difference]: With dead ends: 479 [2021-11-04 16:01:51,873 INFO L226 Difference]: Without dead ends: 298 [2021-11-04 16:01:51,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.76ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 16:01:51,874 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 440.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 510.57ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:51,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 495 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [5 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 510.57ms Time] [2021-11-04 16:01:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-04 16:01:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2021-11-04 16:01:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 289 states have (on average 1.2664359861591696) internal successors, (366), 290 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2021-11-04 16:01:51,882 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 62 [2021-11-04 16:01:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:51,883 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2021-11-04 16:01:51,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2021-11-04 16:01:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-04 16:01:51,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:51,884 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:51,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-04 16:01:52,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:52,101 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:52,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-04 16:01:52,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:52,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812754039] [2021-11-04 16:01:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:52,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:52,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:52,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880890482] [2021-11-04 16:01:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:52,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:52,141 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) [2021-11-04 16:01:52,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-04 16:01:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:52,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 16:01:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 16:01:52,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 16:01:52,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:52,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812754039] [2021-11-04 16:01:52,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:52,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880890482] [2021-11-04 16:01:52,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880890482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:52,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:52,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 16:01:52,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376783250] [2021-11-04 16:01:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:52,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 16:01:52,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 16:01:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 16:01:52,391 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:52,848 INFO L93 Difference]: Finished difference Result 536 states and 683 transitions. [2021-11-04 16:01:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 16:01:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-04 16:01:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:52,849 INFO L225 Difference]: With dead ends: 536 [2021-11-04 16:01:52,849 INFO L226 Difference]: Without dead ends: 293 [2021-11-04 16:01:52,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.28ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 16:01:52,850 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 369.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 442.19ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:52,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 450 Unknown, 0 Unchecked, 1.25ms Time], IncrementalHoareTripleChecker [2 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 442.19ms Time] [2021-11-04 16:01:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-04 16:01:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-11-04 16:01:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 291 states have (on average 1.2646048109965635) internal successors, (368), 292 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 368 transitions. [2021-11-04 16:01:52,859 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 368 transitions. Word has length 69 [2021-11-04 16:01:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:52,859 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 368 transitions. [2021-11-04 16:01:52,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 368 transitions. [2021-11-04 16:01:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-04 16:01:52,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:52,860 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:52,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-04 16:01:53,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:53,070 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1522577957, now seen corresponding path program 1 times [2021-11-04 16:01:53,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:53,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294660722] [2021-11-04 16:01:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:53,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:53,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:53,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743320500] [2021-11-04 16:01:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:53,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:53,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:53,102 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) [2021-11-04 16:01:53,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-04 16:01:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-04 16:01:53,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-04 16:01:53,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 16:01:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-04 16:01:53,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:53,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294660722] [2021-11-04 16:01:53,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:53,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743320500] [2021-11-04 16:01:53,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743320500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 16:01:53,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 16:01:53,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-04 16:01:53,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226819474] [2021-11-04 16:01:53,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 16:01:53,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-04 16:01:53,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-04 16:01:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-04 16:01:53,444 INFO L87 Difference]: Start difference. First operand 293 states and 368 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:53,914 INFO L93 Difference]: Finished difference Result 544 states and 695 transitions. [2021-11-04 16:01:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-04 16:01:53,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-04 16:01:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:53,926 INFO L225 Difference]: With dead ends: 544 [2021-11-04 16:01:53,926 INFO L226 Difference]: Without dead ends: 299 [2021-11-04 16:01:53,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.88ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-04 16:01:53,927 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 322.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 450.89ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:53,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 469 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [15 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 450.89ms Time] [2021-11-04 16:01:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-04 16:01:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2021-11-04 16:01:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 1.2592592592592593) internal successors, (374), 298 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 374 transitions. [2021-11-04 16:01:53,943 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 374 transitions. Word has length 71 [2021-11-04 16:01:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:53,944 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 374 transitions. [2021-11-04 16:01:53,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 374 transitions. [2021-11-04 16:01:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-04 16:01:53,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:53,952 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:53,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-04 16:01:54,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:54,166 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:54,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash 784896644, now seen corresponding path program 2 times [2021-11-04 16:01:54,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:54,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379203550] [2021-11-04 16:01:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:54,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:54,188 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:54,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396735654] [2021-11-04 16:01:54,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-04 16:01:54,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:54,195 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) [2021-11-04 16:01:54,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-04 16:01:54,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-04 16:01:54,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-04 16:01:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 16:01:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:54,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-04 16:01:54,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-04 16:01:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-04 16:01:54,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 16:01:54,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:54,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379203550] [2021-11-04 16:01:54,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:54,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396735654] [2021-11-04 16:01:54,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396735654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:54,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:54,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 16:01:54,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881438806] [2021-11-04 16:01:54,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:54,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 16:01:54,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:54,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 16:01:54,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 16:01:54,468 INFO L87 Difference]: Start difference. First operand 299 states and 374 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:55,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 16:01:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:56,204 INFO L93 Difference]: Finished difference Result 387 states and 491 transitions. [2021-11-04 16:01:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 16:01:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-04 16:01:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:56,206 INFO L225 Difference]: With dead ends: 387 [2021-11-04 16:01:56,206 INFO L226 Difference]: Without dead ends: 383 [2021-11-04 16:01:56,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.29ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 16:01:56,207 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 135 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1588.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.07ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1710.23ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:56,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 0 Invalid, 701 Unknown, 0 Unchecked, 3.07ms Time], IncrementalHoareTripleChecker [3 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1710.23ms Time] [2021-11-04 16:01:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-04 16:01:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 301. [2021-11-04 16:01:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 299 states have (on average 1.2575250836120402) internal successors, (376), 300 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 376 transitions. [2021-11-04 16:01:56,217 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 376 transitions. Word has length 77 [2021-11-04 16:01:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:56,218 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 376 transitions. [2021-11-04 16:01:56,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 376 transitions. [2021-11-04 16:01:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-04 16:01:56,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:56,222 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:56,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-04 16:01:56,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:56,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash 819064170, now seen corresponding path program 1 times [2021-11-04 16:01:56,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:56,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127367173] [2021-11-04 16:01:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:56,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:56,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:56,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14588751] [2021-11-04 16:01:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:56,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:56,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:56,480 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) [2021-11-04 16:01:56,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-04 16:01:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:56,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 16:01:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-04 16:01:56,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 16:01:56,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:56,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127367173] [2021-11-04 16:01:56,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:56,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14588751] [2021-11-04 16:01:56,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14588751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:56,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:56,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 16:01:56,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702493766] [2021-11-04 16:01:56,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:56,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 16:01:56,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 16:01:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 16:01:56,769 INFO L87 Difference]: Start difference. First operand 301 states and 376 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:57,172 INFO L93 Difference]: Finished difference Result 491 states and 635 transitions. [2021-11-04 16:01:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 16:01:57,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-04 16:01:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:57,175 INFO L225 Difference]: With dead ends: 491 [2021-11-04 16:01:57,176 INFO L226 Difference]: Without dead ends: 343 [2021-11-04 16:01:57,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.13ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 16:01:57,178 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 287.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 379.98ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:57,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 467 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [28 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 379.98ms Time] [2021-11-04 16:01:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-04 16:01:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2021-11-04 16:01:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 339 states have (on average 1.2271386430678466) internal successors, (416), 340 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 416 transitions. [2021-11-04 16:01:57,196 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 416 transitions. Word has length 111 [2021-11-04 16:01:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:57,197 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 416 transitions. [2021-11-04 16:01:57,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:57,197 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 416 transitions. [2021-11-04 16:01:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-04 16:01:57,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:57,198 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:57,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-04 16:01:57,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:57,416 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 498859118, now seen corresponding path program 1 times [2021-11-04 16:01:57,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:57,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539991162] [2021-11-04 16:01:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:57,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:57,439 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:57,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510122534] [2021-11-04 16:01:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:57,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:57,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:57,441 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) [2021-11-04 16:01:57,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-04 16:01:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:57,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 16:01:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-04 16:01:57,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 16:01:57,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:57,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539991162] [2021-11-04 16:01:57,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:57,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510122534] [2021-11-04 16:01:57,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510122534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:01:57,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:01:57,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 16:01:57,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791858382] [2021-11-04 16:01:57,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:01:57,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 16:01:57,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:57,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 16:01:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 16:01:57,737 INFO L87 Difference]: Start difference. First operand 341 states and 416 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:01:58,236 INFO L93 Difference]: Finished difference Result 506 states and 630 transitions. [2021-11-04 16:01:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 16:01:58,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-04 16:01:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:01:58,238 INFO L225 Difference]: With dead ends: 506 [2021-11-04 16:01:58,238 INFO L226 Difference]: Without dead ends: 318 [2021-11-04 16:01:58,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.29ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 16:01:58,238 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 397.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 478.12ms IncrementalHoareTripleChecker+Time [2021-11-04 16:01:58,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 576 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [24 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 478.12ms Time] [2021-11-04 16:01:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-04 16:01:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 313. [2021-11-04 16:01:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 311 states have (on average 1.202572347266881) internal successors, (374), 312 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 374 transitions. [2021-11-04 16:01:58,251 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 374 transitions. Word has length 111 [2021-11-04 16:01:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:01:58,252 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 374 transitions. [2021-11-04 16:01:58,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:01:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 374 transitions. [2021-11-04 16:01:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-04 16:01:58,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:01:58,253 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:01:58,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-04 16:01:58,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-04 16:01:58,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:01:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:01:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -383989728, now seen corresponding path program 1 times [2021-11-04 16:01:58,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:01:58,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871722769] [2021-11-04 16:01:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:58,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:01:58,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:01:58,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328203807] [2021-11-04 16:01:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:01:58,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:01:58,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:01:58,484 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) [2021-11-04 16:01:58,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-04 16:01:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:01:58,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-04 16:01:58,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:01:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-04 16:01:58,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 16:01:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-04 16:01:59,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:01:59,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871722769] [2021-11-04 16:01:59,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:01:59,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328203807] [2021-11-04 16:01:59,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328203807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 16:01:59,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 16:01:59,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-04 16:01:59,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427878529] [2021-11-04 16:01:59,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 16:01:59,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-04 16:01:59,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:01:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-04 16:01:59,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-04 16:01:59,037 INFO L87 Difference]: Start difference. First operand 313 states and 374 transitions. Second operand has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:00,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 16:02:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:02:00,750 INFO L93 Difference]: Finished difference Result 590 states and 719 transitions. [2021-11-04 16:02:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-04 16:02:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-04 16:02:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:02:00,752 INFO L225 Difference]: With dead ends: 590 [2021-11-04 16:02:00,752 INFO L226 Difference]: Without dead ends: 325 [2021-11-04 16:02:00,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.54ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-04 16:02:00,753 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1558.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.79ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1684.90ms IncrementalHoareTripleChecker+Time [2021-11-04 16:02:00,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1124 Unknown, 0 Unchecked, 2.79ms Time], IncrementalHoareTripleChecker [30 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 1684.90ms Time] [2021-11-04 16:02:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-04 16:02:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-11-04 16:02:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.195046439628483) internal successors, (386), 324 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 386 transitions. [2021-11-04 16:02:00,769 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 386 transitions. Word has length 111 [2021-11-04 16:02:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:02:00,770 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 386 transitions. [2021-11-04 16:02:00,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 386 transitions. [2021-11-04 16:02:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-04 16:02:00,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:02:00,771 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:02:00,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-04 16:02:00,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:02:00,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:02:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:02:00,984 INFO L85 PathProgramCache]: Analyzing trace with hash 562680000, now seen corresponding path program 2 times [2021-11-04 16:02:00,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:02:00,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949783720] [2021-11-04 16:02:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:02:00,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:02:00,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:02:00,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469132574] [2021-11-04 16:02:00,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-04 16:02:00,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:02:00,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:02:00,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 16:02:01,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-04 16:02:01,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-04 16:02:01,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-04 16:02:01,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-04 16:02:01,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:02:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-04 16:02:01,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 16:02:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-04 16:02:01,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:02:01,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949783720] [2021-11-04 16:02:01,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:02:01,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469132574] [2021-11-04 16:02:01,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469132574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 16:02:01,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 16:02:01,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-04 16:02:01,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006571260] [2021-11-04 16:02:01,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 16:02:01,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-04 16:02:01,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:02:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-04 16:02:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-04 16:02:01,805 INFO L87 Difference]: Start difference. First operand 325 states and 386 transitions. Second operand has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:02:02,387 INFO L93 Difference]: Finished difference Result 626 states and 767 transitions. [2021-11-04 16:02:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-04 16:02:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-04 16:02:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:02:02,389 INFO L225 Difference]: With dead ends: 626 [2021-11-04 16:02:02,389 INFO L226 Difference]: Without dead ends: 349 [2021-11-04 16:02:02,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 233.52ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-04 16:02:02,390 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 441.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 554.72ms IncrementalHoareTripleChecker+Time [2021-11-04 16:02:02,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 781 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [91 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 554.72ms Time] [2021-11-04 16:02:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-04 16:02:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-11-04 16:02:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 347 states have (on average 1.181556195965418) internal successors, (410), 348 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 410 transitions. [2021-11-04 16:02:02,398 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 410 transitions. Word has length 123 [2021-11-04 16:02:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:02:02,398 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 410 transitions. [2021-11-04 16:02:02,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 410 transitions. [2021-11-04 16:02:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-04 16:02:02,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:02:02,399 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:02:02,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-04 16:02:02,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-04 16:02:02,618 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:02:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:02:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash -27956736, now seen corresponding path program 3 times [2021-11-04 16:02:02,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:02:02,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372631315] [2021-11-04 16:02:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:02:02,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:02:02,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:02:02,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451991790] [2021-11-04 16:02:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-04 16:02:02,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:02:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:02:02,630 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 16:02:02,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-04 16:02:02,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-04 16:02:02,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-04 16:02:02,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-04 16:02:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:02:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-04 16:02:03,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 16:02:03,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:02:03,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372631315] [2021-11-04 16:02:03,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:02:03,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451991790] [2021-11-04 16:02:03,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451991790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 16:02:03,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 16:02:03,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 16:02:03,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814747778] [2021-11-04 16:02:03,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 16:02:03,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 16:02:03,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:02:03,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 16:02:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 16:02:03,004 INFO L87 Difference]: Start difference. First operand 349 states and 410 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:02:03,392 INFO L93 Difference]: Finished difference Result 741 states and 878 transitions. [2021-11-04 16:02:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 16:02:03,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-04 16:02:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:02:03,404 INFO L225 Difference]: With dead ends: 741 [2021-11-04 16:02:03,404 INFO L226 Difference]: Without dead ends: 440 [2021-11-04 16:02:03,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.79ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 16:02:03,405 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 414 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 314.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 362.87ms IncrementalHoareTripleChecker+Time [2021-11-04 16:02:03,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 0 Invalid, 442 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [4 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 362.87ms Time] [2021-11-04 16:02:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-04 16:02:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 433. [2021-11-04 16:02:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 431 states have (on average 1.1925754060324827) internal successors, (514), 432 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 514 transitions. [2021-11-04 16:02:03,416 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 514 transitions. Word has length 147 [2021-11-04 16:02:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:02:03,417 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 514 transitions. [2021-11-04 16:02:03,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 514 transitions. [2021-11-04 16:02:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-04 16:02:03,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:02:03,418 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:02:03,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-04 16:02:03,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-04 16:02:03,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:02:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:02:03,637 INFO L85 PathProgramCache]: Analyzing trace with hash -535720422, now seen corresponding path program 1 times [2021-11-04 16:02:03,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:02:03,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137898927] [2021-11-04 16:02:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:02:03,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:02:03,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:02:03,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147996908] [2021-11-04 16:02:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:02:03,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:02:03,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:02:03,655 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 16:02:03,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-04 16:02:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 16:02:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-04 16:02:03,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:02:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-04 16:02:04,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 16:02:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-04 16:02:05,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:02:05,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137898927] [2021-11-04 16:02:05,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:02:05,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147996908] [2021-11-04 16:02:05,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147996908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 16:02:05,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 16:02:05,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-04 16:02:05,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270790033] [2021-11-04 16:02:05,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 16:02:05,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-04 16:02:05,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:02:05,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-04 16:02:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=1129, Unknown=0, NotChecked=0, Total=2256 [2021-11-04 16:02:05,248 INFO L87 Difference]: Start difference. First operand 433 states and 514 transitions. Second operand has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:02:06,357 INFO L93 Difference]: Finished difference Result 837 states and 1037 transitions. [2021-11-04 16:02:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-04 16:02:06,358 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-04 16:02:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:02:06,359 INFO L225 Difference]: With dead ends: 837 [2021-11-04 16:02:06,359 INFO L226 Difference]: Without dead ends: 477 [2021-11-04 16:02:06,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 845.46ms TimeCoverageRelationStatistics Valid=1127, Invalid=1129, Unknown=0, NotChecked=0, Total=2256 [2021-11-04 16:02:06,361 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 868.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.01ms SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1045.02ms IncrementalHoareTripleChecker+Time [2021-11-04 16:02:06,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1591 Unknown, 0 Unchecked, 5.01ms Time], IncrementalHoareTripleChecker [213 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 1045.02ms Time] [2021-11-04 16:02:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-04 16:02:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2021-11-04 16:02:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 475 states have (on average 1.174736842105263) internal successors, (558), 476 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 558 transitions. [2021-11-04 16:02:06,374 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 558 transitions. Word has length 154 [2021-11-04 16:02:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:02:06,374 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 558 transitions. [2021-11-04 16:02:06,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 558 transitions. [2021-11-04 16:02:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-04 16:02:06,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:02:06,376 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:02:06,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-04 16:02:06,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-04 16:02:06,595 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:02:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:02:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1925067386, now seen corresponding path program 2 times [2021-11-04 16:02:06,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:02:06,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905345337] [2021-11-04 16:02:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:02:06,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:02:06,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:02:06,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283136958] [2021-11-04 16:02:06,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-04 16:02:06,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:02:06,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:02:06,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 16:02:06,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-04 16:02:06,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-04 16:02:06,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-04 16:02:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-04 16:02:06,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 16:02:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 2 proven. 990 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-04 16:02:08,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 16:02:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 2 proven. 990 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-04 16:02:11,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 16:02:11,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905345337] [2021-11-04 16:02:11,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-04 16:02:11,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283136958] [2021-11-04 16:02:11,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283136958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-04 16:02:11,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-04 16:02:11,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2021-11-04 16:02:11,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514755665] [2021-11-04 16:02:11,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-04 16:02:11,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-04 16:02:11,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 16:02:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-04 16:02:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-04 16:02:11,493 INFO L87 Difference]: Start difference. First operand 477 states and 558 transitions. Second operand has 92 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:12,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 16:02:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 16:02:13,804 INFO L93 Difference]: Finished difference Result 858 states and 1059 transitions. [2021-11-04 16:02:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-04 16:02:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-11-04 16:02:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 16:02:13,807 INFO L225 Difference]: With dead ends: 858 [2021-11-04 16:02:13,807 INFO L226 Difference]: Without dead ends: 523 [2021-11-04 16:02:13,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3812.93ms TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-04 16:02:13,812 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1995.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.07ms SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2223.45ms IncrementalHoareTripleChecker+Time [2021-11-04 16:02:13,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1824 Unknown, 0 Unchecked, 3.07ms Time], IncrementalHoareTripleChecker [180 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 2223.45ms Time] [2021-11-04 16:02:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-04 16:02:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-04 16:02:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 521 states have (on average 1.1593090211132437) internal successors, (604), 522 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 604 transitions. [2021-11-04 16:02:13,826 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 604 transitions. Word has length 198 [2021-11-04 16:02:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 16:02:13,827 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 604 transitions. [2021-11-04 16:02:13,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 16:02:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 604 transitions. [2021-11-04 16:02:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-04 16:02:13,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 16:02:13,829 INFO L514 BasicCegarLoop]: trace histogram [90, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 16:02:13,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-04 16:02:14,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-04 16:02:14,044 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 16:02:14,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 16:02:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1358050298, now seen corresponding path program 3 times [2021-11-04 16:02:14,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 16:02:14,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819861038] [2021-11-04 16:02:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 16:02:14,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 16:02:14,057 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-04 16:02:14,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122689813] [2021-11-04 16:02:14,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-04 16:02:14,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 16:02:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 16:02:14,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-04 16:02:14,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Killed by 15