./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:11:40,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:11:40,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:11:40,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:11:40,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:11:40,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:11:40,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:11:40,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:11:40,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:11:40,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:11:40,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:11:40,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:11:40,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:11:40,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:11:40,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:11:40,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:11:40,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:11:40,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:11:40,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:11:40,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:11:40,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:11:40,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:11:40,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:11:40,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:11:40,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:11:40,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:11:40,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:11:40,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:11:40,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:11:40,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:11:40,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:11:40,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:11:40,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:11:40,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:11:40,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:11:40,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:11:40,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:11:40,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:11:40,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:11:40,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:11:40,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:11:40,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:11:40,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:11:40,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:11:40,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:11:40,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:11:40,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:11:40,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:11:40,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:11:40,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:11:40,400 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:11:40,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:11:40,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:11:40,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:11:40,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:11:40,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:11:40,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:11:40,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:11:40,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:11:40,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:11:40,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:11:40,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:11:40,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:11:40,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:11:40,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:11:40,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:11:40,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:11:40,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:11:40,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:11:40,404 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:11:40,404 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:11:40,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:11:40,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:11:40,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2021-12-21 16:11:40,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:11:40,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:11:40,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:11:40,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:11:40,636 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:11:40,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-12-21 16:11:40,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c831475/a3a13bc4c93c4125820ac41cf5502e4d/FLAG4ab5106d9 [2021-12-21 16:11:41,266 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:11:41,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-12-21 16:11:41,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c831475/a3a13bc4c93c4125820ac41cf5502e4d/FLAG4ab5106d9 [2021-12-21 16:11:41,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c831475/a3a13bc4c93c4125820ac41cf5502e4d [2021-12-21 16:11:41,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:11:41,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:11:41,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:11:41,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:11:41,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:11:41,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:11:41" (1/1) ... [2021-12-21 16:11:41,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109bad0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:41, skipping insertion in model container [2021-12-21 16:11:41,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:11:41" (1/1) ... [2021-12-21 16:11:41,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:11:41,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:11:42,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-12-21 16:11:42,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:11:42,443 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:11:42,560 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-12-21 16:11:42,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:11:42,729 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:11:42,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42 WrapperNode [2021-12-21 16:11:42,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:11:42,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:11:42,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:11:42,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:11:42,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,867 INFO L137 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2002 [2021-12-21 16:11:42,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:11:42,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:11:42,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:11:42,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:11:42,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:42,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:11:42,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:11:42,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:11:42,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:11:42,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (1/1) ... [2021-12-21 16:11:43,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:11:43,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:43,023 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) [2021-12-21 16:11:43,028 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 [2021-12-21 16:11:43,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2021-12-21 16:11:43,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2021-12-21 16:11:43,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:11:43,054 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-12-21 16:11:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:11:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:11:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:11:43,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:11:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:11:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-12-21 16:11:43,055 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-12-21 16:11:43,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:11:43,056 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:11:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-21 16:11:43,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-21 16:11:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:11:43,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:11:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-21 16:11:43,056 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-21 16:11:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2021-12-21 16:11:43,057 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2021-12-21 16:11:43,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-21 16:11:43,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-21 16:11:43,057 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:11:43,057 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:11:43,057 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2021-12-21 16:11:43,057 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2021-12-21 16:11:43,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:11:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2021-12-21 16:11:43,058 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2021-12-21 16:11:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:11:43,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:11:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:11:43,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:11:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-21 16:11:43,058 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-21 16:11:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:11:43,059 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:11:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-21 16:11:43,059 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-21 16:11:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:11:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-12-21 16:11:43,060 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-12-21 16:11:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-12-21 16:11:43,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-12-21 16:11:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:11:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2021-12-21 16:11:43,061 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2021-12-21 16:11:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2021-12-21 16:11:43,061 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2021-12-21 16:11:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-12-21 16:11:43,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-12-21 16:11:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2021-12-21 16:11:43,061 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2021-12-21 16:11:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2021-12-21 16:11:43,062 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2021-12-21 16:11:43,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:11:43,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:11:43,063 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-12-21 16:11:43,063 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-12-21 16:11:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2021-12-21 16:11:43,064 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2021-12-21 16:11:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-12-21 16:11:43,064 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-12-21 16:11:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:11:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-21 16:11:43,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-21 16:11:43,064 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2021-12-21 16:11:43,064 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2021-12-21 16:11:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-21 16:11:43,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-21 16:11:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:11:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-12-21 16:11:43,066 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-12-21 16:11:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:11:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-21 16:11:43,066 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-21 16:11:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2021-12-21 16:11:43,066 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2021-12-21 16:11:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-21 16:11:43,066 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-21 16:11:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-21 16:11:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-21 16:11:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-21 16:11:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-21 16:11:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-21 16:11:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-21 16:11:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-21 16:11:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-21 16:11:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-21 16:11:43,068 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-21 16:11:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:11:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-12-21 16:11:43,069 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-12-21 16:11:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-12-21 16:11:43,069 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-12-21 16:11:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:11:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:11:43,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:11:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:11:43,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:11:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-12-21 16:11:43,070 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-12-21 16:11:43,398 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:11:43,401 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:11:43,536 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:11:44,345 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:11:44,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:11:44,355 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 16:11:44,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:11:44 BoogieIcfgContainer [2021-12-21 16:11:44,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:11:44,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:11:44,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:11:44,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:11:44,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:11:41" (1/3) ... [2021-12-21 16:11:44,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78595a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:11:44, skipping insertion in model container [2021-12-21 16:11:44,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:42" (2/3) ... [2021-12-21 16:11:44,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78595a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:11:44, skipping insertion in model container [2021-12-21 16:11:44,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:11:44" (3/3) ... [2021-12-21 16:11:44,365 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-12-21 16:11:44,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:11:44,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:11:44,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:11:44,416 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 [2021-12-21 16:11:44,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:11:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 726 states, 530 states have (on average 1.3716981132075472) internal successors, (727), 546 states have internal predecessors, (727), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2021-12-21 16:11:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 16:11:44,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:44,465 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:44,466 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash 135613019, now seen corresponding path program 1 times [2021-12-21 16:11:44,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:44,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505420745] [2021-12-21 16:11:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:44,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:44,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:11:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:44,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:11:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:44,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:11:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:44,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:11:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:44,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 16:11:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:11:44,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505420745] [2021-12-21 16:11:44,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505420745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:44,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:44,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:44,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16168931] [2021-12-21 16:11:44,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:44,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:44,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:44,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:44,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:44,863 INFO L87 Difference]: Start difference. First operand has 726 states, 530 states have (on average 1.3716981132075472) internal successors, (727), 546 states have internal predecessors, (727), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:11:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:46,024 INFO L93 Difference]: Finished difference Result 2353 states and 3522 transitions. [2021-12-21 16:11:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:11:46,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2021-12-21 16:11:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:46,053 INFO L225 Difference]: With dead ends: 2353 [2021-12-21 16:11:46,053 INFO L226 Difference]: Without dead ends: 1614 [2021-12-21 16:11:46,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:11:46,068 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 1854 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 940 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:46,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1994 Valid, 2486 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [940 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 16:11:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-12-21 16:11:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1368. [2021-12-21 16:11:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1006 states have (on average 1.3538767395626243) internal successors, (1362), 1024 states have internal predecessors, (1362), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2021-12-21 16:11:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1919 transitions. [2021-12-21 16:11:46,205 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1919 transitions. Word has length 53 [2021-12-21 16:11:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:46,206 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1919 transitions. [2021-12-21 16:11:46,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:11:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1919 transitions. [2021-12-21 16:11:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 16:11:46,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:46,209 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:46,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:11:46,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1669594221, now seen corresponding path program 1 times [2021-12-21 16:11:46,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:46,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391351897] [2021-12-21 16:11:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:46,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:46,268 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:11:46,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760555595] [2021-12-21 16:11:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:46,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:46,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:46,284 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) [2021-12-21 16:11:46,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 16:11:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:46,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 16:11:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:11:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:11:46,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:11:46,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:46,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391351897] [2021-12-21 16:11:46,700 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:11:46,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760555595] [2021-12-21 16:11:46,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760555595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:46,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:46,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 16:11:46,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814169901] [2021-12-21 16:11:46,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:46,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:11:46,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:11:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:11:46,705 INFO L87 Difference]: Start difference. First operand 1368 states and 1919 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 16:11:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:46,787 INFO L93 Difference]: Finished difference Result 2722 states and 3819 transitions. [2021-12-21 16:11:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:11:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2021-12-21 16:11:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:46,794 INFO L225 Difference]: With dead ends: 2722 [2021-12-21 16:11:46,794 INFO L226 Difference]: Without dead ends: 1368 [2021-12-21 16:11:46,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:11:46,799 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 971 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:46,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 992 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:11:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-12-21 16:11:46,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1368. [2021-12-21 16:11:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1006 states have (on average 1.3528827037773359) internal successors, (1361), 1024 states have internal predecessors, (1361), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2021-12-21 16:11:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1918 transitions. [2021-12-21 16:11:46,851 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1918 transitions. Word has length 55 [2021-12-21 16:11:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:46,851 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1918 transitions. [2021-12-21 16:11:46,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 16:11:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1918 transitions. [2021-12-21 16:11:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 16:11:46,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:46,853 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:46,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 16:11:47,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:47,066 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:47,067 INFO L85 PathProgramCache]: Analyzing trace with hash 658476971, now seen corresponding path program 1 times [2021-12-21 16:11:47,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:47,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936566418] [2021-12-21 16:11:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:47,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:47,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:11:47,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898740703] [2021-12-21 16:11:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:47,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:47,116 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) [2021-12-21 16:11:47,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 16:11:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 16:11:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:11:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:11:47,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:11:47,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:47,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936566418] [2021-12-21 16:11:47,499 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:11:47,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898740703] [2021-12-21 16:11:47,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898740703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:47,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:47,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:47,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032679224] [2021-12-21 16:11:47,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:47,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:47,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:47,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:47,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:47,501 INFO L87 Difference]: Start difference. First operand 1368 states and 1918 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 16:11:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:47,624 INFO L93 Difference]: Finished difference Result 4073 states and 5792 transitions. [2021-12-21 16:11:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:11:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2021-12-21 16:11:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:47,635 INFO L225 Difference]: With dead ends: 4073 [2021-12-21 16:11:47,636 INFO L226 Difference]: Without dead ends: 2695 [2021-12-21 16:11:47,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:11:47,641 INFO L933 BasicCegarLoop]: 1237 mSDtfsCounter, 975 mSDsluCounter, 3472 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 4709 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:47,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 4709 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:11:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-12-21 16:11:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2687. [2021-12-21 16:11:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 1975 states have (on average 1.3544303797468353) internal successors, (2675), 2011 states have internal predecessors, (2675), 547 states have call successors, (547), 165 states have call predecessors, (547), 164 states have return successors, (602), 538 states have call predecessors, (602), 546 states have call successors, (602) [2021-12-21 16:11:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 3824 transitions. [2021-12-21 16:11:47,724 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 3824 transitions. Word has length 55 [2021-12-21 16:11:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:47,724 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 3824 transitions. [2021-12-21 16:11:47,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 16:11:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 3824 transitions. [2021-12-21 16:11:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-21 16:11:47,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:47,730 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 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] [2021-12-21 16:11:47,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 16:11:47,945 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,SelfDestructingSolverStorable2 [2021-12-21 16:11:47,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1631345663, now seen corresponding path program 1 times [2021-12-21 16:11:47,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:47,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657477467] [2021-12-21 16:11:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:47,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:11:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:11:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:11:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:11:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:11:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:11:48,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:48,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657477467] [2021-12-21 16:11:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657477467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:48,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:48,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:48,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947544037] [2021-12-21 16:11:48,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:48,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:48,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:48,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:48,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:48,154 INFO L87 Difference]: Start difference. First operand 2687 states and 3824 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 16:11:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:49,842 INFO L93 Difference]: Finished difference Result 8119 states and 11688 transitions. [2021-12-21 16:11:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:11:49,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2021-12-21 16:11:49,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:49,866 INFO L225 Difference]: With dead ends: 8119 [2021-12-21 16:11:49,867 INFO L226 Difference]: Without dead ends: 5446 [2021-12-21 16:11:49,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:49,877 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 1564 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:49,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1652 Valid, 2644 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 16:11:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-12-21 16:11:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 4985. [2021-12-21 16:11:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4985 states, 3692 states have (on average 1.3518418201516793) internal successors, (4991), 3761 states have internal predecessors, (4991), 948 states have call successors, (948), 313 states have call predecessors, (948), 344 states have return successors, (1110), 958 states have call predecessors, (1110), 947 states have call successors, (1110) [2021-12-21 16:11:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 7049 transitions. [2021-12-21 16:11:50,082 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 7049 transitions. Word has length 89 [2021-12-21 16:11:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:50,082 INFO L470 AbstractCegarLoop]: Abstraction has 4985 states and 7049 transitions. [2021-12-21 16:11:50,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 16:11:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 7049 transitions. [2021-12-21 16:11:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 16:11:50,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:50,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 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] [2021-12-21 16:11:50,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:11:50,087 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1258426200, now seen corresponding path program 1 times [2021-12-21 16:11:50,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:50,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411287435] [2021-12-21 16:11:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:50,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:11:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:11:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:11:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:11:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:11:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:11:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 16:11:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:11:50,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411287435] [2021-12-21 16:11:50,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411287435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:50,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:50,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:50,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565624214] [2021-12-21 16:11:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:50,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:50,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:50,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:50,198 INFO L87 Difference]: Start difference. First operand 4985 states and 7049 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 16:11:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:51,891 INFO L93 Difference]: Finished difference Result 14213 states and 20186 transitions. [2021-12-21 16:11:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:11:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2021-12-21 16:11:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:51,927 INFO L225 Difference]: With dead ends: 14213 [2021-12-21 16:11:51,927 INFO L226 Difference]: Without dead ends: 9242 [2021-12-21 16:11:51,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:51,943 INFO L933 BasicCegarLoop]: 1058 mSDtfsCounter, 1489 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:51,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1575 Valid, 2609 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 16:11:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-12-21 16:11:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 8517. [2021-12-21 16:11:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8517 states, 6326 states have (on average 1.346190325640215) internal successors, (8516), 6455 states have internal predecessors, (8516), 1552 states have call successors, (1552), 575 states have call predecessors, (1552), 638 states have return successors, (1841), 1562 states have call predecessors, (1841), 1551 states have call successors, (1841) [2021-12-21 16:11:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8517 states to 8517 states and 11909 transitions. [2021-12-21 16:11:52,281 INFO L78 Accepts]: Start accepts. Automaton has 8517 states and 11909 transitions. Word has length 104 [2021-12-21 16:11:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:52,282 INFO L470 AbstractCegarLoop]: Abstraction has 8517 states and 11909 transitions. [2021-12-21 16:11:52,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 16:11:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8517 states and 11909 transitions. [2021-12-21 16:11:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 16:11:52,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:52,293 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 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] [2021-12-21 16:11:52,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:11:52,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1464423004, now seen corresponding path program 1 times [2021-12-21 16:11:52,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:52,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745948844] [2021-12-21 16:11:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:52,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:11:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:11:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:11:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:11:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 16:11:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 16:11:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 16:11:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 16:11:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-21 16:11:52,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745948844] [2021-12-21 16:11:52,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745948844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:52,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:52,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:52,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440497585] [2021-12-21 16:11:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:52,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:52,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:52,416 INFO L87 Difference]: Start difference. First operand 8517 states and 11909 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 16:11:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:54,111 INFO L93 Difference]: Finished difference Result 22537 states and 31728 transitions. [2021-12-21 16:11:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:11:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2021-12-21 16:11:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:54,188 INFO L225 Difference]: With dead ends: 22537 [2021-12-21 16:11:54,188 INFO L226 Difference]: Without dead ends: 14034 [2021-12-21 16:11:54,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:11:54,217 INFO L933 BasicCegarLoop]: 1332 mSDtfsCounter, 1208 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:54,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 2711 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 16:11:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14034 states. [2021-12-21 16:11:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14034 to 12847. [2021-12-21 16:11:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12847 states, 9466 states have (on average 1.3322417071624761) internal successors, (12611), 9666 states have internal predecessors, (12611), 2330 states have call successors, (2330), 943 states have call predecessors, (2330), 1050 states have return successors, (2831), 2357 states have call predecessors, (2831), 2329 states have call successors, (2831) [2021-12-21 16:11:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12847 states to 12847 states and 17772 transitions. [2021-12-21 16:11:54,736 INFO L78 Accepts]: Start accepts. Automaton has 12847 states and 17772 transitions. Word has length 118 [2021-12-21 16:11:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:54,737 INFO L470 AbstractCegarLoop]: Abstraction has 12847 states and 17772 transitions. [2021-12-21 16:11:54,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 16:11:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12847 states and 17772 transitions. [2021-12-21 16:11:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 16:11:54,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:54,745 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 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] [2021-12-21 16:11:54,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:11:54,746 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:54,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1872959109, now seen corresponding path program 1 times [2021-12-21 16:11:54,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:54,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125574074] [2021-12-21 16:11:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:54,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:54,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:11:54,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815966034] [2021-12-21 16:11:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:54,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:54,804 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) [2021-12-21 16:11:54,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 16:11:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 16:11:55,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:11:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 16:11:55,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:11:55,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125574074] [2021-12-21 16:11:55,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:11:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815966034] [2021-12-21 16:11:55,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815966034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:55,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:55,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:11:55,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296132188] [2021-12-21 16:11:55,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:55,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:11:55,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:11:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:11:55,305 INFO L87 Difference]: Start difference. First operand 12847 states and 17772 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-21 16:11:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:55,887 INFO L93 Difference]: Finished difference Result 33105 states and 45688 transitions. [2021-12-21 16:11:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:11:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 123 [2021-12-21 16:11:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:55,974 INFO L225 Difference]: With dead ends: 33105 [2021-12-21 16:11:55,974 INFO L226 Difference]: Without dead ends: 20283 [2021-12-21 16:11:56,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:11:56,022 INFO L933 BasicCegarLoop]: 1142 mSDtfsCounter, 941 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:56,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 2063 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:11:56,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2021-12-21 16:11:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 20270. [2021-12-21 16:11:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20270 states, 14946 states have (on average 1.3285828984343637) internal successors, (19857), 15275 states have internal predecessors, (19857), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2021-12-21 16:11:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20270 states to 20270 states and 27838 transitions. [2021-12-21 16:11:56,717 INFO L78 Accepts]: Start accepts. Automaton has 20270 states and 27838 transitions. Word has length 123 [2021-12-21 16:11:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:56,718 INFO L470 AbstractCegarLoop]: Abstraction has 20270 states and 27838 transitions. [2021-12-21 16:11:56,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-21 16:11:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 20270 states and 27838 transitions. [2021-12-21 16:11:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 16:11:56,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:56,727 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 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] [2021-12-21 16:11:56,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 16:11:56,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:56,940 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 546342467, now seen corresponding path program 1 times [2021-12-21 16:11:56,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:56,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769788950] [2021-12-21 16:11:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:56,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:56,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:11:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5634799] [2021-12-21 16:11:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:56,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:56,984 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) [2021-12-21 16:11:57,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 16:11:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:11:57,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:11:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-21 16:11:57,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:11:57,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:57,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769788950] [2021-12-21 16:11:57,460 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:11:57,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5634799] [2021-12-21 16:11:57,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5634799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:57,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:57,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:11:57,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955997968] [2021-12-21 16:11:57,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:57,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:11:57,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:11:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:11:57,462 INFO L87 Difference]: Start difference. First operand 20270 states and 27838 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 16:11:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:57,917 INFO L93 Difference]: Finished difference Result 30962 states and 42975 transitions. [2021-12-21 16:11:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:11:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 123 [2021-12-21 16:11:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:58,000 INFO L225 Difference]: With dead ends: 30962 [2021-12-21 16:11:58,000 INFO L226 Difference]: Without dead ends: 20314 [2021-12-21 16:11:58,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:11:58,178 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 5 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:58,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1990 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:11:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20314 states. [2021-12-21 16:11:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20314 to 20314. [2021-12-21 16:11:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20314 states, 14990 states have (on average 1.32761841227485) internal successors, (19901), 15319 states have internal predecessors, (19901), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2021-12-21 16:11:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20314 states to 20314 states and 27882 transitions. [2021-12-21 16:11:58,898 INFO L78 Accepts]: Start accepts. Automaton has 20314 states and 27882 transitions. Word has length 123 [2021-12-21 16:11:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:58,900 INFO L470 AbstractCegarLoop]: Abstraction has 20314 states and 27882 transitions. [2021-12-21 16:11:58,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 16:11:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 20314 states and 27882 transitions. [2021-12-21 16:11:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 16:11:58,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:58,911 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 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] [2021-12-21 16:11:58,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 16:11:59,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:59,130 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash -756774844, now seen corresponding path program 1 times [2021-12-21 16:11:59,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:59,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368153232] [2021-12-21 16:11:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:59,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:59,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:11:59,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132487159] [2021-12-21 16:11:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:59,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:59,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:59,184 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) [2021-12-21 16:11:59,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 16:11:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:11:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:11:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-21 16:11:59,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:11:59,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:59,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368153232] [2021-12-21 16:11:59,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:11:59,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132487159] [2021-12-21 16:11:59,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132487159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:59,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:59,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:11:59,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579336830] [2021-12-21 16:11:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:59,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:11:59,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:11:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:11:59,633 INFO L87 Difference]: Start difference. First operand 20314 states and 27882 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 16:12:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:00,254 INFO L93 Difference]: Finished difference Result 40681 states and 55847 transitions. [2021-12-21 16:12:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:12:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 125 [2021-12-21 16:12:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:00,384 INFO L225 Difference]: With dead ends: 40681 [2021-12-21 16:12:00,399 INFO L226 Difference]: Without dead ends: 20356 [2021-12-21 16:12:00,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:12:00,437 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 12 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:00,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2994 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:12:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-12-21 16:12:01,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 20317. [2021-12-21 16:12:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20317 states, 14993 states have (on average 1.3267524844927634) internal successors, (19892), 15322 states have internal predecessors, (19892), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2021-12-21 16:12:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20317 states to 20317 states and 27873 transitions. [2021-12-21 16:12:01,110 INFO L78 Accepts]: Start accepts. Automaton has 20317 states and 27873 transitions. Word has length 125 [2021-12-21 16:12:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:01,110 INFO L470 AbstractCegarLoop]: Abstraction has 20317 states and 27873 transitions. [2021-12-21 16:12:01,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 16:12:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20317 states and 27873 transitions. [2021-12-21 16:12:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-21 16:12:01,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:01,120 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 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] [2021-12-21 16:12:01,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 16:12:01,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:01,335 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:01,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1089324516, now seen corresponding path program 1 times [2021-12-21 16:12:01,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:01,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255089460] [2021-12-21 16:12:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:01,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:01,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:01,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361687964] [2021-12-21 16:12:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:01,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:01,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:01,361 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) [2021-12-21 16:12:01,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 16:12:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 16:12:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-21 16:12:01,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:12:01,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:01,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255089460] [2021-12-21 16:12:01,849 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:01,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361687964] [2021-12-21 16:12:01,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361687964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:01,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:01,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:12:01,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717142273] [2021-12-21 16:12:01,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:01,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:12:01,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:12:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:12:01,852 INFO L87 Difference]: Start difference. First operand 20317 states and 27873 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-21 16:12:04,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:04,044 INFO L93 Difference]: Finished difference Result 42109 states and 58238 transitions. [2021-12-21 16:12:04,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:12:04,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 126 [2021-12-21 16:12:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:04,121 INFO L225 Difference]: With dead ends: 42109 [2021-12-21 16:12:04,122 INFO L226 Difference]: Without dead ends: 21817 [2021-12-21 16:12:04,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:12:04,166 INFO L933 BasicCegarLoop]: 1031 mSDtfsCounter, 1283 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2853 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:04,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1393 Valid, 2853 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 16:12:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21817 states. [2021-12-21 16:12:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21817 to 20019. [2021-12-21 16:12:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20019 states, 14731 states have (on average 1.3226529088317154) internal successors, (19484), 15038 states have internal predecessors, (19484), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2021-12-21 16:12:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20019 states to 20019 states and 27137 transitions. [2021-12-21 16:12:04,952 INFO L78 Accepts]: Start accepts. Automaton has 20019 states and 27137 transitions. Word has length 126 [2021-12-21 16:12:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:04,952 INFO L470 AbstractCegarLoop]: Abstraction has 20019 states and 27137 transitions. [2021-12-21 16:12:04,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-21 16:12:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 20019 states and 27137 transitions. [2021-12-21 16:12:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 16:12:04,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:04,962 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 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] [2021-12-21 16:12:04,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:05,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:05,183 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash 537022152, now seen corresponding path program 1 times [2021-12-21 16:12:05,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:05,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877482710] [2021-12-21 16:12:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:05,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:05,210 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:05,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206676178] [2021-12-21 16:12:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:05,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:05,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:05,211 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) [2021-12-21 16:12:05,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 16:12:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:12:05,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:05,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:12:05,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:05,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877482710] [2021-12-21 16:12:05,750 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206676178] [2021-12-21 16:12:05,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206676178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:05,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:05,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:12:05,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524114876] [2021-12-21 16:12:05,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:05,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:12:05,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:12:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:12:05,752 INFO L87 Difference]: Start difference. First operand 20019 states and 27137 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:12:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:06,648 INFO L93 Difference]: Finished difference Result 20236 states and 27431 transitions. [2021-12-21 16:12:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:12:06,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 135 [2021-12-21 16:12:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:06,715 INFO L225 Difference]: With dead ends: 20236 [2021-12-21 16:12:06,715 INFO L226 Difference]: Without dead ends: 20187 [2021-12-21 16:12:06,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:12:06,729 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 941 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:06,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 1685 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 16:12:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20187 states. [2021-12-21 16:12:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20187 to 20031. [2021-12-21 16:12:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20031 states, 14743 states have (on average 1.3223902869158244) internal successors, (19496), 15050 states have internal predecessors, (19496), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2021-12-21 16:12:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20031 states to 20031 states and 27149 transitions. [2021-12-21 16:12:07,396 INFO L78 Accepts]: Start accepts. Automaton has 20031 states and 27149 transitions. Word has length 135 [2021-12-21 16:12:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:07,396 INFO L470 AbstractCegarLoop]: Abstraction has 20031 states and 27149 transitions. [2021-12-21 16:12:07,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:12:07,396 INFO L276 IsEmpty]: Start isEmpty. Operand 20031 states and 27149 transitions. [2021-12-21 16:12:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-21 16:12:07,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:07,408 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:07,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:07,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:07,627 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 164212269, now seen corresponding path program 1 times [2021-12-21 16:12:07,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:07,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204325374] [2021-12-21 16:12:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:07,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:07,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:07,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571901296] [2021-12-21 16:12:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:07,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:07,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:07,657 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) [2021-12-21 16:12:07,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 16:12:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 16:12:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-21 16:12:08,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:12:08,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:08,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204325374] [2021-12-21 16:12:08,353 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:08,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571901296] [2021-12-21 16:12:08,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571901296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:08,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:08,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:12:08,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34760969] [2021-12-21 16:12:08,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:08,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:12:08,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:12:08,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:12:08,356 INFO L87 Difference]: Start difference. First operand 20031 states and 27149 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 16:12:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:08,746 INFO L93 Difference]: Finished difference Result 30016 states and 40705 transitions. [2021-12-21 16:12:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:12:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2021-12-21 16:12:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:08,777 INFO L225 Difference]: With dead ends: 30016 [2021-12-21 16:12:08,778 INFO L226 Difference]: Without dead ends: 9721 [2021-12-21 16:12:08,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:12:08,826 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 901 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:08,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 1118 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:12:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9721 states. [2021-12-21 16:12:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9721 to 9721. [2021-12-21 16:12:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 7136 states have (on average 1.3185257847533631) internal successors, (9409), 7292 states have internal predecessors, (9409), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2021-12-21 16:12:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 13152 transitions. [2021-12-21 16:12:09,258 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 13152 transitions. Word has length 132 [2021-12-21 16:12:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:09,258 INFO L470 AbstractCegarLoop]: Abstraction has 9721 states and 13152 transitions. [2021-12-21 16:12:09,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 16:12:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 13152 transitions. [2021-12-21 16:12:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 16:12:09,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:09,268 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 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] [2021-12-21 16:12:09,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:09,488 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,SelfDestructingSolverStorable11 [2021-12-21 16:12:09,488 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1265799972, now seen corresponding path program 1 times [2021-12-21 16:12:09,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:09,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869264989] [2021-12-21 16:12:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:09,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:09,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:09,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179537388] [2021-12-21 16:12:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:09,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:09,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:09,516 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) [2021-12-21 16:12:09,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 16:12:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:09,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 16:12:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:10,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:10,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:10,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869264989] [2021-12-21 16:12:10,319 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:10,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179537388] [2021-12-21 16:12:10,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179537388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:10,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:12:10,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-21 16:12:10,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141720623] [2021-12-21 16:12:10,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:10,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:12:10,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:12:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:12:10,321 INFO L87 Difference]: Start difference. First operand 9721 states and 13152 transitions. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-21 16:12:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:11,303 INFO L93 Difference]: Finished difference Result 10274 states and 13938 transitions. [2021-12-21 16:12:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:12:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 134 [2021-12-21 16:12:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:11,334 INFO L225 Difference]: With dead ends: 10274 [2021-12-21 16:12:11,334 INFO L226 Difference]: Without dead ends: 10225 [2021-12-21 16:12:11,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:12:11,347 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1684 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:11,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1692 Valid, 1704 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 16:12:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10225 states. [2021-12-21 16:12:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10225 to 10225. [2021-12-21 16:12:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10225 states, 7514 states have (on average 1.3120841096619644) internal successors, (9859), 7688 states have internal predecessors, (9859), 1938 states have call successors, (1938), 737 states have call predecessors, (1938), 772 states have return successors, (2057), 1896 states have call predecessors, (2057), 1937 states have call successors, (2057) [2021-12-21 16:12:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10225 states to 10225 states and 13854 transitions. [2021-12-21 16:12:11,753 INFO L78 Accepts]: Start accepts. Automaton has 10225 states and 13854 transitions. Word has length 134 [2021-12-21 16:12:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:11,753 INFO L470 AbstractCegarLoop]: Abstraction has 10225 states and 13854 transitions. [2021-12-21 16:12:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-21 16:12:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 10225 states and 13854 transitions. [2021-12-21 16:12:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-21 16:12:11,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:11,824 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 3, 3, 2, 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] [2021-12-21 16:12:11,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:12,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 16:12:12,043 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -292548597, now seen corresponding path program 1 times [2021-12-21 16:12:12,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677043919] [2021-12-21 16:12:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:12,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:12,074 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:12,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781032621] [2021-12-21 16:12:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:12,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:12,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:12,100 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) [2021-12-21 16:12:12,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 16:12:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:12,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 16:12:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:12,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:13,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:13,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677043919] [2021-12-21 16:12:13,004 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:13,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781032621] [2021-12-21 16:12:13,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781032621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:13,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:12:13,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-21 16:12:13,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821788235] [2021-12-21 16:12:13,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:13,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 16:12:13,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 16:12:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-21 16:12:13,009 INFO L87 Difference]: Start difference. First operand 10225 states and 13854 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-21 16:12:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:13,893 INFO L93 Difference]: Finished difference Result 11282 states and 15378 transitions. [2021-12-21 16:12:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 16:12:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 149 [2021-12-21 16:12:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:13,924 INFO L225 Difference]: With dead ends: 11282 [2021-12-21 16:12:13,925 INFO L226 Difference]: Without dead ends: 11233 [2021-12-21 16:12:13,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:12:13,932 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1898 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 2472 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:13,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1918 Valid, 2472 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 16:12:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11233 states. [2021-12-21 16:12:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11233 to 11233. [2021-12-21 16:12:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11233 states, 8270 states have (on average 1.3009673518742442) internal successors, (10759), 8480 states have internal predecessors, (10759), 2190 states have call successors, (2190), 737 states have call predecessors, (2190), 772 states have return successors, (2309), 2112 states have call predecessors, (2309), 2189 states have call successors, (2309) [2021-12-21 16:12:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11233 states to 11233 states and 15258 transitions. [2021-12-21 16:12:14,333 INFO L78 Accepts]: Start accepts. Automaton has 11233 states and 15258 transitions. Word has length 149 [2021-12-21 16:12:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:14,334 INFO L470 AbstractCegarLoop]: Abstraction has 11233 states and 15258 transitions. [2021-12-21 16:12:14,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-21 16:12:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 11233 states and 15258 transitions. [2021-12-21 16:12:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-21 16:12:14,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:14,382 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 3, 3, 2, 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] [2021-12-21 16:12:14,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:14,602 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,SelfDestructingSolverStorable13 [2021-12-21 16:12:14,603 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash 72168147, now seen corresponding path program 2 times [2021-12-21 16:12:14,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:14,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325228507] [2021-12-21 16:12:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:14,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:14,630 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:14,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055077308] [2021-12-21 16:12:14,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:12:14,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:14,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:14,632 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) [2021-12-21 16:12:14,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 16:12:14,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 16:12:14,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:12:14,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 16:12:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-12-21 16:12:15,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:12:15,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:15,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325228507] [2021-12-21 16:12:15,117 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:15,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055077308] [2021-12-21 16:12:15,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055077308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:15,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:15,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:12:15,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066274819] [2021-12-21 16:12:15,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:15,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:12:15,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:15,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:12:15,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:12:15,119 INFO L87 Difference]: Start difference. First operand 11233 states and 15258 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:12:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:15,474 INFO L93 Difference]: Finished difference Result 22510 states and 30816 transitions. [2021-12-21 16:12:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:12:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 170 [2021-12-21 16:12:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:15,508 INFO L225 Difference]: With dead ends: 22510 [2021-12-21 16:12:15,508 INFO L226 Difference]: Without dead ends: 11355 [2021-12-21 16:12:15,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:12:15,531 INFO L933 BasicCegarLoop]: 995 mSDtfsCounter, 2 mSDsluCounter, 2980 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3975 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:15,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3975 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:12:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-12-21 16:12:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 11313. [2021-12-21 16:12:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11313 states, 8330 states have (on average 1.2987995198079232) internal successors, (10819), 8540 states have internal predecessors, (10819), 2190 states have call successors, (2190), 737 states have call predecessors, (2190), 792 states have return successors, (2338), 2132 states have call predecessors, (2338), 2189 states have call successors, (2338) [2021-12-21 16:12:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11313 states to 11313 states and 15347 transitions. [2021-12-21 16:12:15,885 INFO L78 Accepts]: Start accepts. Automaton has 11313 states and 15347 transitions. Word has length 170 [2021-12-21 16:12:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:15,885 INFO L470 AbstractCegarLoop]: Abstraction has 11313 states and 15347 transitions. [2021-12-21 16:12:15,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:12:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 11313 states and 15347 transitions. [2021-12-21 16:12:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-21 16:12:15,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:15,903 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 3, 3, 2, 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] [2021-12-21 16:12:15,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:16,122 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,SelfDestructingSolverStorable14 [2021-12-21 16:12:16,122 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash -535217326, now seen corresponding path program 1 times [2021-12-21 16:12:16,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:16,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381836767] [2021-12-21 16:12:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:16,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:16,144 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:16,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586351623] [2021-12-21 16:12:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:16,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:16,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:16,159 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) [2021-12-21 16:12:16,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 16:12:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 16:12:16,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:16,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:17,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381836767] [2021-12-21 16:12:17,354 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586351623] [2021-12-21 16:12:17,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586351623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:17,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:12:17,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-21 16:12:17,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889287625] [2021-12-21 16:12:17,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:17,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 16:12:17,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 16:12:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-21 16:12:17,358 INFO L87 Difference]: Start difference. First operand 11313 states and 15347 transitions. Second operand has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-21 16:12:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:18,622 INFO L93 Difference]: Finished difference Result 13378 states and 18347 transitions. [2021-12-21 16:12:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 16:12:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 182 [2021-12-21 16:12:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:18,658 INFO L225 Difference]: With dead ends: 13378 [2021-12-21 16:12:18,658 INFO L226 Difference]: Without dead ends: 13329 [2021-12-21 16:12:18,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 16:12:18,667 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1574 mSDsluCounter, 2350 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 3333 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:18,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 3333 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 16:12:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13329 states. [2021-12-21 16:12:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13329 to 13329. [2021-12-21 16:12:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13329 states, 9842 states have (on average 1.2821580979475717) internal successors, (12619), 10124 states have internal predecessors, (12619), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 792 states have return successors, (2842), 2564 states have call predecessors, (2842), 2693 states have call successors, (2842) [2021-12-21 16:12:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13329 states to 13329 states and 18155 transitions. [2021-12-21 16:12:19,187 INFO L78 Accepts]: Start accepts. Automaton has 13329 states and 18155 transitions. Word has length 182 [2021-12-21 16:12:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:19,188 INFO L470 AbstractCegarLoop]: Abstraction has 13329 states and 18155 transitions. [2021-12-21 16:12:19,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-21 16:12:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 13329 states and 18155 transitions. [2021-12-21 16:12:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-21 16:12:19,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:19,219 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 3, 2, 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] [2021-12-21 16:12:19,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:19,438 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,SelfDestructingSolverStorable15 [2021-12-21 16:12:19,438 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1281005638, now seen corresponding path program 2 times [2021-12-21 16:12:19,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097281129] [2021-12-21 16:12:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:19,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:19,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765292907] [2021-12-21 16:12:19,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:12:19,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:19,474 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) [2021-12-21 16:12:19,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 16:12:19,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 16:12:19,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:12:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-21 16:12:19,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2021-12-21 16:12:20,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:12:20,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097281129] [2021-12-21 16:12:20,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:20,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765292907] [2021-12-21 16:12:20,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765292907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:20,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:20,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-21 16:12:20,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585518877] [2021-12-21 16:12:20,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:20,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 16:12:20,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 16:12:20,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-21 16:12:20,237 INFO L87 Difference]: Start difference. First operand 13329 states and 18155 transitions. Second operand has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-21 16:12:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:20,930 INFO L93 Difference]: Finished difference Result 26858 states and 36734 transitions. [2021-12-21 16:12:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 16:12:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 230 [2021-12-21 16:12:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:20,979 INFO L225 Difference]: With dead ends: 26858 [2021-12-21 16:12:20,980 INFO L226 Difference]: Without dead ends: 13607 [2021-12-21 16:12:21,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-12-21 16:12:21,018 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 20 mSDsluCounter, 13186 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 14204 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:21,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 14204 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:12:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13607 states. [2021-12-21 16:12:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13607 to 13441. [2021-12-21 16:12:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13441 states, 9922 states have (on average 1.2770610763958878) internal successors, (12671), 10204 states have internal predecessors, (12671), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 824 states have return successors, (2898), 2596 states have call predecessors, (2898), 2693 states have call successors, (2898) [2021-12-21 16:12:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13441 states to 13441 states and 18263 transitions. [2021-12-21 16:12:21,622 INFO L78 Accepts]: Start accepts. Automaton has 13441 states and 18263 transitions. Word has length 230 [2021-12-21 16:12:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:21,624 INFO L470 AbstractCegarLoop]: Abstraction has 13441 states and 18263 transitions. [2021-12-21 16:12:21,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-21 16:12:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 13441 states and 18263 transitions. [2021-12-21 16:12:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-21 16:12:21,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:21,664 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 3, 2, 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] [2021-12-21 16:12:21,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:21,878 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,SelfDestructingSolverStorable16 [2021-12-21 16:12:21,879 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash -999549107, now seen corresponding path program 1 times [2021-12-21 16:12:21,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:21,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982638492] [2021-12-21 16:12:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:21,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:21,907 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:21,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855343476] [2021-12-21 16:12:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:21,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:21,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:21,909 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) [2021-12-21 16:12:21,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 16:12:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:22,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 16:12:22,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:23,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:24,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982638492] [2021-12-21 16:12:24,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:24,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855343476] [2021-12-21 16:12:24,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855343476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:24,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:12:24,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-12-21 16:12:24,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754828110] [2021-12-21 16:12:24,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:24,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-21 16:12:24,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:24,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-21 16:12:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-12-21 16:12:24,087 INFO L87 Difference]: Start difference. First operand 13441 states and 18263 transitions. Second operand has 50 states, 50 states have (on average 6.46) internal successors, (323), 50 states have internal predecessors, (323), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-21 16:12:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:27,533 INFO L93 Difference]: Finished difference Result 17522 states and 24215 transitions. [2021-12-21 16:12:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-21 16:12:27,534 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.46) internal successors, (323), 50 states have internal predecessors, (323), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 225 [2021-12-21 16:12:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:27,586 INFO L225 Difference]: With dead ends: 17522 [2021-12-21 16:12:27,586 INFO L226 Difference]: Without dead ends: 17473 [2021-12-21 16:12:27,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-12-21 16:12:27,600 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 2185 mSDsluCounter, 4249 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 5232 SdHoareTripleChecker+Invalid, 3253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:27,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2277 Valid, 5232 Invalid, 3253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 16:12:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17473 states. [2021-12-21 16:12:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17473 to 17473. [2021-12-21 16:12:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17473 states, 12946 states have (on average 1.2568360883670633) internal successors, (16271), 13372 states have internal predecessors, (16271), 3702 states have call successors, (3702), 737 states have call predecessors, (3702), 824 states have return successors, (3906), 3460 states have call predecessors, (3906), 3701 states have call successors, (3906) [2021-12-21 16:12:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17473 states to 17473 states and 23879 transitions. [2021-12-21 16:12:28,427 INFO L78 Accepts]: Start accepts. Automaton has 17473 states and 23879 transitions. Word has length 225 [2021-12-21 16:12:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:28,428 INFO L470 AbstractCegarLoop]: Abstraction has 17473 states and 23879 transitions. [2021-12-21 16:12:28,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.46) internal successors, (323), 50 states have internal predecessors, (323), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-21 16:12:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 17473 states and 23879 transitions. [2021-12-21 16:12:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-21 16:12:28,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:28,475 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 9, 9, 8, 3, 3, 2, 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] [2021-12-21 16:12:28,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:28,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:28,682 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2065245009, now seen corresponding path program 1 times [2021-12-21 16:12:28,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:28,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804926585] [2021-12-21 16:12:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:28,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:28,722 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 16:12:28,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011053315] [2021-12-21 16:12:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:28,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:28,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:28,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:12:28,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 16:12:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:29,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 16:12:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:31,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-21 16:12:34,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804926585] [2021-12-21 16:12:34,934 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 16:12:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011053315] [2021-12-21 16:12:34,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011053315] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:34,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:12:34,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2021-12-21 16:12:34,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822675418] [2021-12-21 16:12:34,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:34,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-21 16:12:34,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-21 16:12:34,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-12-21 16:12:34,939 INFO L87 Difference]: Start difference. First operand 17473 states and 23879 transitions. Second operand has 98 states, 98 states have (on average 5.316326530612245) internal successors, (521), 98 states have internal predecessors, (521), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30)